View source for Trade Evolution

'''Trade evolution''' refers to the process of [[evolution|evolving]] a Pokémon by [[trade|trading]] it to another game. This [[methods of evolution|method of evolution]] was introduced in [[Generation I]]. From [[Generation II]] onwards, several Pokémon evolve when traded with a [[held item]]. In [[Pokémon Legends: Arceus]], the trade evolutions are also available without the need to trade the Pokémon.

==List of trade evolutions==
{| style="margin:auto; text-align:center; background:#{{blue color}}; {{roundy|10px}}; border:3px solid #{{blue color dark}}" cellpadding=2px
|-
! colspan="2" style="background:#{{green color light}}; {{roundytl|5px}}" | Previous evolution
! colspan="3" style="background:#{{green color light}}; {{roundytr|5px}}" | Trade evolution
|- 
| colspan="5" style="background: #{{kanto color light}}"  | '''Introduced in [[Generation I]]'''
|- style="background:#fff"
| {{ArtP|063|Abra}}<br>{{pcolor|Abra|000}}<br><small>{{typecolor|Psychic}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 16+<br>→
| {{ArtP|064|Kadabra}}<br>{{pcolor|Kadabra|000}}<br><small>{{typecolor|Psychic}}</small>
| [[File:Link Trade icon SwSh.png|28px]]<br>Trade<br>→
| {{ArtP|065|Alakazam}}<br>{{pcolor|Alakazam|000}}<br><small>{{typecolor|Psychic}}</small>
|- style="background:#fff"
| {{ArtP|066|Machop}}<br>{{pcolor|Machop|000}}<br><small>{{typecolor|Fighting}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 28+<br>→
| {{ArtP|067|Machoke}}<br>{{pcolor|Machoke|000}}<br><small>{{typecolor|Fighting}}</small>
| [[File:Link Trade icon SwSh.png|28px]]<br>Trade<br>→
| {{ArtP|068|Machamp}}<br>{{pcolor|Machamp|000}}<br><small>{{typecolor|Fighting}}</small>
|- style="background:#fff"
| {{ArtP|074|Geodude}}<br>{{pcolor|Geodude|000}}<br><small>{{typecolor|Rock}}{{typecolor|Ground}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 25+<br>→
| {{ArtP|075|Graveler}}<br>{{pcolor|Graveler|000}}<br><small>{{typecolor|Rock}}{{typecolor|Ground}}</small>
| [[File:Link Trade icon SwSh.png|28px]]<br>Trade<br>→
| {{ArtP|076|Golem}}<br>{{pcolor|Golem|000}}<br><small>{{typecolor|Rock}}{{typecolor|Ground}}</small>
|- style="background:#fff"
| {{ArtP|092|Gastly}}<br>{{pcolor|Gastly|000}}<br><small>{{typecolor|Ghost}}{{typecolor|Poison}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 25+<br>→
| {{ArtP|093|Haunter}}<br>{{pcolor|Haunter|000}}<br><small>{{typecolor|Ghost}}{{typecolor|Poison}}</small>
| [[File:Link Trade icon SwSh.png|28px]]<br>Trade<br>→
| {{ArtP|094|Gengar}}<br>{{pcolor|Gengar|000}}<br><small>{{typecolor|Ghost}}{{typecolor|Poison}}</small>
|- 
| colspan="5" style="background: #{{johto color light}}"  | '''Introduced in [[Generation II]]'''
|- style="background:#fff"
| {{ArtP|060|Poliwag}}<br>{{pcolor|Poliwag|000}}<br><small>{{typecolor|Water}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 25+<br>→
| {{ArtP|061|Poliwhirl}}<br>{{pcolor|Poliwhirl|000}}<br><small>{{typecolor|Water}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|King's Rock}}<br>Trade<br><small>(holding [[King's Rock]])</small><br>→
| {{ArtP|186|Politoed}}<br>{{pcolor|Politoed|000}}<br><small>{{typecolor|Water}}</small>
|- style="background:#fff"
| colspan="2" | Slowpoke is the lowest in its line
| {{ArtP|079|Slowpoke}}<br>{{pcolor|Slowpoke|000}}<br><small>{{typecolor|Water}}{{typecolor|Psychic}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|King's Rock}}<br>Trade<br><small>(holding [[King's Rock]])</small><br>→
| {{ArtP|199|Slowking}}<br>{{pcolor|Slowking|000}}<br><small>{{typecolor|Water}}{{typecolor|Psychic}}</small>
|- style="background:#fff"
| colspan="2" | Onix is the lowest in its line
| {{ArtP|095|Onix}}<br>{{pcolor|Onix|000}}<br><small>{{typecolor|Rock}}{{typecolor|Ground}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Metal Coat}}<br>Trade<br><small>(holding [[Metal Coat]])</small><br>→
| {{ArtP|208|Steelix}}<br>{{pcolor|Steelix|000}}<br><small>{{typecolor|Steel}}{{typecolor|Ground}}</small>
|- style="background:#fff"
| colspan="2" | Scyther is the lowest in its line
| {{ArtP|123|Scyther}}<br>{{pcolor|Scyther|000}}<br><small>{{typecolor|Bug}}{{typecolor|Flying}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Metal Coat}}<br>Trade<br><small>(holding [[Metal Coat]])</small><br>→
| {{ArtP|212|Scizor}}<br>{{pcolor|Scizor|000}}<br><small>{{typecolor|Bug}}{{typecolor|Steel}}</small>
|- style="background:#fff"
| {{ArtP|116|Horsea}}<br>{{pcolor|Horsea|000}}<br><small>{{typecolor|Water}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 32+<br>→
| {{ArtP|117|Seadra}}<br>{{pcolor|Seadra|000}}<br><small>{{typecolor|Water}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Dragon Scale}}<br>Trade<br><small>(holding [[Dragon Scale]])</small><br>→
| {{ArtP|230|Kingdra}}<br>{{pcolor|Kingdra|000}}<br><small>{{typecolor|Water}}{{typecolor|Dragon}}</small>
|- style="background:#fff"
| colspan="2" | Porygon is the lowest in its line
| {{ArtP|137|Porygon}}<br>{{pcolor|Porygon|000}}<br><small>{{typecolor|Normal}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Upgrade}}<br>Trade<br><small>(holding [[Upgrade]])</small><br>→
| {{ArtP|233|Porygon2}}<br>{{pcolor|Porygon2|000}}<br><small>{{typecolor|Normal}}</small>
|-
| colspan="5" | '''Introduced in [[Generation III]]'''
|- style="background:#fff"
| colspan="2" rowspan="2" | Clamperl is the lowest in its line
| rowspan="2" | {{ArtP|366|Clamperl}}<br>{{pcolor|Clamperl|000}}<br><small>{{typecolor|Water}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Deep Sea Tooth}}<br>Trade<br><small>(holding [[Deep Sea Tooth]])</small><br>→
| {{ArtP|367|Huntail}}<br>{{pcolor|Huntail|000}}<br><small>{{typecolor|Water}}</small>
|- style="background:#fff"
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Deep Sea Scale}}<br>Trade<br><small>(holding [[Deep Sea Scale]])</small><br>→
| {{ArtP|368|Gorebyss}}<br>{{pcolor|Gorebyss|000}}<br><small>{{typecolor|Water}}</small>
|- 
| colspan="5" style="background: #{{sinnoh color light}}"  | '''Introduced in [[Generation IV]]'''
|- style="background:#fff"
| {{ArtP|111|Rhyhorn}}<br>{{pcolor|Rhyhorn|000}}<br><small>{{typecolor|Ground}}{{typecolor|Rock}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 42+<br>→
| {{ArtP|112|Rhydon}}<br>{{pcolor|Rhydon|000}}<br><small>{{typecolor|Ground}}{{typecolor|Rock}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Protector}}<br>Trade<br><small>(holding [[Protector]])</small><br>→
| {{ArtP|464|Rhyperior}}<br>{{pcolor|Rhyperior|000}}<br><small>{{typecolor|Ground}}{{typecolor|Rock}}</small>
|- style="background:#fff"
| {{ArtP|239|Elekid}}<br>{{pcolor|Elekid|000}}<br><small>{{typecolor|Electric}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 30+<br>→
| {{ArtP|125|Electabuzz}}<br>{{pcolor|Electabuzz|000}}<br><small>{{typecolor|Electric}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Electirizer}}<br>Trade<br><small>(holding [[Electirizer]])</small><br>→
| {{ArtP|466|Electivire}}<br>{{pcolor|Electivire|000}}<br><small>{{typecolor|Electric}}</small>
|- style="background:#fff"
| {{ArtP|240|Magby}}<br>{{pcolor|Magby|000}}<br><small>{{typecolor|Fire}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 30+<br>→
| {{ArtP|126|Magmar}}<br>{{pcolor|Magmar|000}}<br><small>{{typecolor|Fire}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Magmarizer}}<br>Trade<br><small>(holding [[Magmarizer]])</small><br>→
| {{ArtP|467|Magmortar}}<br>{{pcolor|Magmortar|000}}<br><small>{{typecolor|Fire}}</small>
|- style="background:#fff"
| {{ArtP|137|Porygon}}<br>{{pcolor|Porygon|000}}<br><small>{{typecolor|Normal}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Upgrade}}<br>Trade<br><small>(holding [[Upgrade]])</small><br>→
| {{ArtP|233|Porygon2}}<br>{{pcolor|Porygon2|000}}<br><small>{{typecolor|Normal}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Dubious Disc}}<br>Trade<br><small>(holding [[Dubious Disc]])</small><br>→
| {{ArtP|474|Porygon-Z}}<br>{{pcolor|Porygon-Z|000}}<br><small>{{typecolor|Normal}}</small>
|- style="background:#fff"
| {{ArtP|355|Duskull}}<br>{{pcolor|Duskull|000}}<br><small>{{typecolor|Ghost}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 37+<br>→
| {{ArtP|356|Dusclops}}<br>{{pcolor|Dusclops|000}}<br><small>{{typecolor|Ghost}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Reaper Cloth}}<br>Trade<br><small>(holding [[Reaper Cloth]])</small><br>→
| {{ArtP|477|Dusknoir}}<br>{{pcolor|Dusknoir|000}}<br><small>{{typecolor|Ghost}}</small>
|- 
| colspan="5" style="background: #{{unova color light}}"  | '''Introduced in [[Generation V]]'''
|- style="background:#fff"
| colspan="2" | Feebas is the lowest in its line
| {{ArtP|349|Feebas}}<br>{{pcolor|Feebas|000}}<br><small>{{typecolor|Water}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Prism Scale}}<br>Trade<br><small>(holding [[Prism Scale]])</small><br>→
| {{ArtP|350|Milotic}}<br>{{pcolor|Milotic|000}}<br><small>{{typecolor|Water}}</small>
|- style="background:#fff"
| {{ArtP|524|Roggenrola}}<br>{{pcolor|Roggenrola|000}}<br><small>{{typecolor|Rock}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 25+<br>→
| {{ArtP|525|Boldore}}<br>{{pcolor|Boldore|000}}<br><small>{{typecolor|Rock}}</small>
| [[File:Link Trade icon SwSh.png|28px]]<br>Trade<br>→
| {{ArtP|526|Gigalith}}<br>{{pcolor|Gigalith|000}}<br><small>{{typecolor|Rock}}</small>
|- style="background:#fff"
| {{ArtP|532|Timburr}}<br>{{pcolor|Timburr|000}}<br><small>{{typecolor|Fighting}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 25+<br>→
| {{ArtP|533|Gurdurr}}<br>{{pcolor|Gurdurr|000}}<br><small>{{typecolor|Fighting}}</small>
| [[File:Link Trade icon SwSh.png|28px]]<br>Trade<br>→
| {{ArtP|534|Conkeldurr}}<br>{{pcolor|Conkeldurr|000}}<br><small>{{typecolor|Fighting}}</small>
|- style="background:#fff"
| colspan="2" | Karrablast is the lowest in its line
| {{ArtP|588|Karrablast}}<br>{{pcolor|Karrablast|000}}<br><small>{{typecolor|Bug}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{ArtP|616|Shelmet}}<br>Trade<br><small>(traded for [[Shelmet]])</small><br>→
| {{ArtP|589|Escavalier}}<br>{{pcolor|Escavalier|000}}<br><small>{{typecolor|Bug}}{{typecolor|Steel}}</small>
|- style="background:#fff"
| colspan="2" | Shelmet is the lowest in its line
| {{ArtP|616|Shelmet}}<br>{{pcolor|Shelmet|000}}<br><small>{{typecolor|Bug}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{ArtP|588|Karrablast}}<br>Trade<br><small>(traded for [[Karrablast]])</small><br>→
| {{ArtP|617|Accelgor}}<br>{{pcolor|Accelgor|000}}<br><small>{{typecolor|Bug}}</small>
|- 
| colspan="5" style="background: #{{kalos color light}}"  | '''Introduced in [[Generation VI]]'''
|- style="background:#fff"
| colspan="2" | Spritzee is the lowest in its line
| {{ArtP|682|Spritzee}}<br>{{pcolor|Spritzee|000}}<br><small>{{typecolor|Fairy}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Sachet}}<br>Trade<br><small>(holding [[Sachet]])</small><br>→
| {{ArtP|683|Aromatisse}}<br>{{pcolor|Aromatisse|000}}<br><small>{{typecolor|Fairy}}</small>
|- style="background:#fff"
| colspan="2" | Swirlix is the lowest in its line
| {{ArtP|684|Swirlix}}<br>{{pcolor|Swirlix|000}}<br><small>{{typecolor|Fairy}}</small>
| [[File:Link Trade icon SwSh.png|28px]] + {{bag|Whipped Dream}}<br>Trade<br><small>(holding [[Whipped Dream]])</small><br>→
| {{ArtP|685|Slurpuff}}<br>{{pcolor|Slurpuff|000}}<br><small>{{typecolor|Fairy}}</small>
|- style="background:#fff"
| colspan="2" | Phantump is the lowest in its line
| {{ArtP|708|Phantump}}<br>{{pcolor|Phantump|000}}<br><small>{{typecolor|Ghost}}{{typecolor|Grass}}</small>
| [[File:Link Trade icon SwSh.png|28px]]<br>Trade<br>→
| {{ArtP|709|Trevenant}}<br>{{pcolor|Trevenant|000}}<br><small>{{typecolor|Ghost}}{{typecolor|Grass}}</small>
|- style="background:#fff"
| colspan="2" | Pumpkaboo is the lowest in its line
| {{ArtP|710|Pumpkaboo}}<br>{{pcolor|Pumpkaboo|000}}<br><small>{{typecolor|Ghost}}{{typecolor|Grass}}</small>
| [[File:Link Trade icon SwSh.png|28px]]<br>Trade<br>→
| {{ArtP|711|Gourgeist}}<br>{{pcolor|Gourgeist|000}}<br><small>{{typecolor|Ghost}}{{typecolor|Grass}}</small>
|- 
| colspan="5" style="background: #{{alola color light}}"  | '''Introduced in [[Generation VII]]'''
|- style="background:#fff"
| style="{{roundybl|5px}}" | {{ArtP|074|Geodude|form=-Alola}}<br>{{pcolor|Geodude|000}}<br><small>{{color2|000|Alolan form}}<br>{{typecolor|Rock}}{{typecolor|Electric}}</small>
| {{bag|Rare Candy}}<br>[[Level]] 25+<br>→
| {{ArtP|075|Graveler|form=-Alola}}<br>{{pcolor|Graveler|000}}<br><small>{{color2|000|Alolan form}}<br>{{typecolor|Rock}}{{typecolor|Electric}}</small>
| [[File:Link Trade icon SwSh.png|28px]]<br>Trade<br>→
| style="{{roundybr|5px}}" | {{ArtP|076|Golem|form=-Alola}}<br>{{pcolor|Golem|000}}<br><small>{{color2|000|Alolan form}}<br>{{typecolor|Rock}}{{typecolor|Electric}}</small>
|}{{clear}}

==In the core series games==
In the [[core series]] games, the Pokémon evolves automatically after being traded. Several Pokémon evolve by trade without any additional requirement, but several other Pokémon need to be [[held item|holding]] a specific [[Evolution item]] in order to evolve. The item is consumed after the evolution.

The player is unable to press B to [[evolution prevention|cancel a trade evolution]], unlike certain other [[methods of evolution]]. If a Pokémon is able to evolve by trade with no held item, then it is possible to prevent this evolution by trading it with a held [[Everstone]], except {{p|Kadabra}} still evolves while holding this item from [[Generation IV]] onwards. However, due to the lack of held items in [[Generation I]], {{LGPE}} and {{g|Legends: Arceus}}, and due to a glitch in [[Generation III]], there is no way to prevent those Pokémon to evolve when traded in those games. There is also no way prevent a Kadabra from evolving when traded from Generation IV onwards.

{{p|Feebas}} evolves into {{p|Milotic}} when [[level]]ed up with its {{OBP|Beautiful|condition}} condition high enough or when traded while holding a [[Prism Scale]]. For more details, see [[Feebas#Evolution data|Feebas → Evolution data]].

In the case of {{p|Karrablast}} or {{p|Shelmet}}, they evolve specifically when one is traded by the other. However, if either of those Pokémon is holding an Everstone during this trade, neither will evolve.

During the trade evolution, the player who received this Pokémon obtains both the unevolved and evolved species as caught in their [[Pokédex]].

===Generation II===
{{incomplete|section|Confirm if a Pokémon holding the correct evolution item in GSC is able to evolve in the Time Capsule after it is traded to RBY and back to GSC}}

In [[Generation II]], any Pokémon (including {{p|Kadabra}}) traded while holding an [[Everstone]] will not evolve by trade.

===Generation III===
In [[Generation III]] only, the trade evolutions are affected by a [[List of glitches (Generation III)#Held item loss glitch|glitch]]: if a Pokémon is able to evolve by trade with no item, but that Pokémon is traded while holding any item, this item will be consumed during the evolution.

If {{p|Kadabra}}, {{p|Machoke}}, {{p|Graveler}}, or {{p|Haunter}} is traded while holding an [[Everstone]], this Pokémon will still evolve while this item is consumed by the glitch mentioned above.

In {{game|FireRed and LeafGreen|s}}, if the player does not have the [[National Pokédex]], when a Pokémon in the [[Kanto Pokédex]] meets its evolution conditions but its evolved form is not in the Kanto Pokédex (including the trade evolutions such as {{p|Onix}} into {{p|Steelix}}), it will attempt to evolve but fail.

===Generation IV onwards===
From [[Generation IV]] onwards, due to an explicitly programmed exception, {{p|Kadabra}} still evolves into {{p|Alakazam}} while holding an Everstone. Other trade evolutions are prevented if the Pokémon is holding an Everstone.

===Generation VIII===
====Pokémon Legends: Arceus====
In {{g|Legends: Arceus}}, the trade evolutions are available with no need to trade Pokémon.

The [[Linking Cord]] item can be used from the player's [[satchel]] to trigger the evolution of Pokémon that would evolve by trade with no held item. However, those Pokémon can still alternatively evolve by being traded as is the case in other core series games.

The Linking Cord has no effect on Pokémon that [[:Category:Pokémon that evolve by trading with a held item|evolve by being traded while holding an item]]. In this game, due to the absence of [[held item]]s, those Pokémon are unable to evolve by trade. Instead, they evolve if the player uses the correct [[Evolution item]] from the satchel on the Pokémon.

===Availability outside of trades===
In some cases, the trade evolutions are [[Pokémon availability|available]] outside of trades. <!-- The Shadow Scizor from Japanese Colosseum, and the Magmortar/Electivire gifts from Pokémon Battle Revolution, are not included here because those require connecting with another system anyway. -->

* {{pkmn|Blue (Japanese)}}: Two of the [[in-game trade]]s in this game involve Pokémon that evolve by trading. In one, the player gives away {{p|Kadabra}} and receives {{p|Graveler}}; the other one has them give away {{p|Machoke}} and receive {{p|Haunter}}. The Pokémon they receive this way will thus evolve into {{p|Golem}} and {{p|Gengar}} respectively, allowing them to be registered without linking to another game.
* {{pkmn|Yellow}}: One of the in-game trades in this game allows the player to give away {{p|Cubone}} and receive {{p|Machoke}} in return, which will thus evolve into {{p|Machamp}}.
* {{game2|Diamond|Pearl|Platinum}}: Wild {{p|Steelix}} can be found directly in the lower floors of [[Iron Island]], without needing to go through evolution. Additionally, if the player has access to [[dual-slot mode]] with any [[Generation III]] game, wild {{p|Gengar}} can be found in one room of the [[Old Chateau]].
* {{pkmn|HeartGold and SoulSilver}}: Wild {{p|Steelix}} can be found at [[Mt. Silver]], in the room where Moltres spawns. Alternatively, after the player defeats the Champion, [[Jasmine]] can also give out a Steelix in an in-game trade where she will accept any Pokémon in return.
* {{pkmn|Black and White}}: {{p|Politoed}}, {{p|Slowking}}, {{p|Kingdra}}, {{p|Milotic}} (which has newly become a trade evolution in this generation, with no means of increasing its Beauty), {{p|Huntail}}, and {{p|Gorebyss}} are all catchable in the wild using the phenomenon of rippling water in various places, though Huntail is version-exclusive to Black while Gorebyss is exclusive to White. 
* {{pkmn|Black 2 and White 2}}: With the exception of Slowking, the wild trade evolutions that were available from Black and White's rippling water remain available here, with Huntail and Gorebyss retaining their version exclusivity for players who are unable to trade. In addition, wild {{p|Steelix}} are now available from the phenomenon of dust clouds in [[Clay Tunnel]], and two in-game trades offer trade-evolution Pokémon directly at their final stage, without registering the pre-evolved form first. One NPC requests {{p|Emolga}} and gives away {{p|Gigalith}} (in Black and White, this same NPC asks for {{p|Boldore}} in a trade and gives away Emolga), while another asks for {{p|Hippowdon}} and gives away {{p|Alakazam}}, though this trade does not become available until the player does a separate trade, as well as a battle, with the same NPC.
* {{pkmn|X and Y}}: {{p|Trevenant}}, {{p|Politoed}}, {{p|Huntail}}, and {{p|Gorebyss}} are all available as wild encounters on their respective routes, and once again Huntail and Gorebyss serve as version counterparts when obtained this way, with Huntail appearing in X and Gorebyss in Y. In addition, an in-game trade is available where the player gives away {{p|Luvdisc}} and receives {{p|Steelix}}.
* {{pkmn|Sun and Moon}}: Wild {{p|Gengar}}, {{p|Politoed}}, and {{p|Trevenant}} have a small chance to appear in [[SOS Battle]]s in which their respective pre-evolutions call for help, allowing them to be obtained without trading. Wild {{p|Conkeldurr}} can also be found using [[Island Scan]] on Mondays, and there is an in-game trade where the player can give away {{p|Haunter}} and receive Alolan {{p|Graveler}}, which will thus evolve into {{p|Golem}}.
* {{pkmn|Ultra Sun and Ultra Moon}}: The Gengar, Politoed, and Trevenant helpers are still available here, joined by additional SOS helpers in {{p|Slowking}}, {{p|Huntail}}, and {{p|Gorebyss}}. Unlike in previous games, the Huntail and Gorebyss encounters are no longer version-exclusive, but instead depend on whether the battle started during daytime or nighttime according to the in-game clock. No trade evolutions are available from Island Scan this time, and the NPC who offered the Graveler trade in the previous games now offers a different trade instead, in which both traders give away {{p|Phantump}} which thus evolves into Trevenant.
* {{pkmn|Sword and Shield}}: With the exceptions of {{p|Porygon2}}, {{p|Porygon-Z}}, and {{p|Slowking}}, all the Pokémon that appear in these games and that evolve by trading can also be found as wandering Pokémon, in either the [[Wild Area]] or one of its DLC counterparts ([[Isle of Armor]] or [[Crown Tundra]]), though {{p|Slurpuff}} is version-exclusive to Sword and {{p|Aromatisse}} is exclusive to Shield, and some Pokémon may only appear on days with specific weather conditions. They may also be obtained from [[Max Raid Battle]] dens--prior to the release of the Expansion Pass, {{p|Escavalier}} could not be found as a wanderer and was exclusive to raid dens originating from Sword, while Accelgor was exclusive to raid dens originating from Shield. Finally, while the non-Galarian form of Slowking is not obtainable in the wild, it has a chance to be found in the [[Max Lair]] during Dynamax Adventures.
* {{pkmn|Legends: Arceus}}: As noted above, the Pokédex in this game was designed to be completed without needing to connect to other players. The trade-evolution Pokémon can therefore be obtained without trading, by using either the Linking Cord item or the item that the species would normally hold during a trade in order to evolve, as though that item were an evolution stone. These species may also be found in the wild as [[Alpha Pokémon]], or during [[massive mass outbreak]]s or [[space-time distortion]]s.
* {{pkmn|Scarlet and Violet}}: All trade-evolution Pokémon that exist in these games have a small chance to be found in their fully evolved stage in raid dens for [[Tera Raid Battle]]s, as does {{p|Palafin}} which is not a trade evolution but which does normally require connecting to other players in [[Union Circle]] to evolve. In the case of Pokémon that were first added to the game during the two phases of the Expansion Pass, only raid dens in the appropriate area ([[Kitakami]] or the [[Blueberry Academy]]) have a chance to spawn them.  {{p|Gengar}} and {{p|Scizor}} in particular can also be found in the wild in specific DLC areas. Additionally, there is an in-game trade in which the player gives away {{p|Pincurchin}} and receives {{p|Haunter}}; unlike in-game trades in Diamond, Pearl, and their remakes, this Haunter is not holding an [[Everstone]] so it will evolve into Gengar.

==In the side series games==
{{incomplete|section|State whether or not it is possible to stop a trade evolution by pressing B in the Stadium games, Colosseum, and XD}}

===Pokémon Stadium series===
In [[Pokémon Stadium]] and {{pkmn|Stadium 2}}, Pokémon are able to evolve by trade as in the [[core series]] games. The Pokémon trades are available by using trade machine in the {{OBP|Pokémon Lab|Stadium}}, where Pokémon are traded between two [[core series]] games using [[Transfer Pak]]s.

The earlier game {{jap|Pokémon Stadium|Japanese Pokémon Stadium}} has no trade feature. [[Pokémon Stadium]] is compatible with Generation I Pokémon, which require no held item. [[Pokémon Stadium 2]] is compatible with Generation I and II Pokémon, some of which require a held item to evolve.

===Pokémon Colosseum===
In [[Pokémon Colosseum]], Pokémon are able to evolve by trade as in the [[core series]] games.

There are no trade evolutions available outside of trades.

===Pokémon XD: Gale of Darkness===
In [[Pokémon XD: Gale of Darkness]], Pokémon are able to evolve by trade as in the [[core series]] games.

The only trade evolution available outside of trades is the {{pkmn2|Shadow}} {{p|Scizor}} in the Japanese version of Pokémon XD, which requires the [[e-Reader]] and the [[Pokémon Colosseum Double Battle e]] cards.

===Pokémon HOME===
In [[Pokémon HOME]], trade evolutions are not triggered by online trades, unlike in the [[core series]] games.

==In the spin-off games==
===Pokémon GO===
{{main|Trade (GO)|section=Trade Evolution}}
In [[Pokémon GO]], this is officially referred to as "trade Evolution". This feature was introduced on January 10, 2020.<ref>[https://pokemongolive.com/en/post/trade-evolution/ Trade Evolution and more Pokémon originally discovered in Unova are here!]</ref> The {{cat|Pokémon that evolve through trading|Pokémon that evolve by trading}} (with no [[held item]]) in the [[core series]] can either evolve in Pokémon GO if the player spends {{OBP|Candy|GO}} or if the player has obtained this Pokémon from a trade. However, only a subset of those Pokémon can currently trade evolve in Pokémon GO.

Unlike in the core series, which requires Pokémon to be at a specific evolutionary stage to evolve via trade, Pokémon in Pokémon GO become eligible for trade Evolution if they were traded at any evolutionary stage prior to their trade Evolution stage. For example, trading a {{p|Gastly}} and then evolving it to {{p|Haunter}} makes it eligible to later evolve into {{p|Gengar}} at no Candy cost.

Notably, no {{cat|Pokémon that evolve by trading with a held item}} in the core series can trade evolve in Pokémon GO. These Pokémon instead require [[List of items (GO)#Evolution items|Evolution items]] in addition to {{OBP|Candy|GO}} to evolve.

===Pokémon Mystery Dungeon series===
====Pokémon Mystery Dungeon: Red and Blue Rescue Team, Explorers of Time, Darkness, and Sky====
In the [[Pokémon Mystery Dungeon series]], the Link Cable item is used to [[Evolution (Mystery Dungeon)|evolve]] the Pokémon that would evolve by trade in the core series games. If the Pokémon would evolve by being traded while holding an item, then both the Link and that same item are required to evolve this Pokémon. For instance, {{p|Scyther}} evolves into {{p|Scizor}} by using both the Link Cable and the Metal Coat. The items are consumed during the evolution.

====Pokémon Mystery Dungeon: Rescue Team DX====
In [[Pokémon Mystery Dungeon: Rescue Team DX]], the evolutionary items (including the Link Cable and the other items that are specific to each Pokémon such as the King's Rock or the Dragon Scale) are replaced by the Evolution Crystal item instead.

===Pokémon Sleep===
{{main|Linking Cord|section=Pokémon Sleep}}
In [[Pokémon Sleep]], the [[Linking Cord]] item and certain amounts of {{OBP|candy|Sleep}} are required to evolve the available Pokémon that would normally evolve by trade in the [[core series]] games. This item and the candy are consumed upon use.

==In the anime==
In the {{pkmn|anime}}, trade evolutions have occurred several times. They have also been shown to occur if the Pokémon in question is transferred between [[Pokémon Center]]s while holding the correct [[Evolution item]] instead of being traded, as seen in ''[[EP247|Outrageous Fortunes]]'' with [[Misty's Politoed|Misty's Poliwhirl]] and in ''[[AG095|The Evolutionary War]]'' with [[Nancy]] and {{OBP|Keith|AG095}}'s {{p|Clamperl}}. In ''[[JN056|Searching for Chivalry]]'', [[Goh]]'s {{p|Scyther}}'s trade evolution into {{TP|Goh|Scizor}} was triggered by it being transferred through a [[trade machine]] while holding a [[Metal Coat]], without it leaving Goh's ownership at any point.

===List of trade evolutions in the anime===
{| class="roundy" style="margin:auto; text-align:center; background:#{{blue color}}; border:3px solid #{{blue color}}"
|-
! colspan="2" style="background:#{{green color light}}; {{roundytl|5px}}" | First Trainer's Pokémon
! colspan="2" style="background:#{{green color light}}" | Second Trainer's Pokémon
! style="background:#{{green color light}}" | Episode traded
! style="background:#{{green color light}}; {{roundytr|5px}}" | Notes
|- style="background:#FFF"
| {{MS/HOME|0616|Professor Juniper#Accelgor}}
| {{an|Bianca}}'s {{p|Shelmet}}
| {{MS/HOME|0588|Bianca (anime)#Escavalier}}
| [[Professor Juniper]]'s {{p|Karrablast}}
| ''[[BW063|Evolution Exchange Excitement!]]''
| Evolved into {{p|Accelgor}} and {{p|Escavalier}} respectively.
|- style="background:#FFF"
| style="{{roundybl|5px}}" | {{MS/HOME|0710Su|Jessie's Gourgeist}}
| [[Jessie]]'s {{TP|Jessie|Pumpkaboo}}
| {{MS/HOME|0303|Count Pumpka#Mawile}}
| [[Count Pumpka]]'s {{p|Mawile}}
| ''[[XY082|A Festival Trade! A Festival Farewell?]]''
| style="{{roundybr|5px}}" | Pumpkaboo evolves into {{p|Gourgeist}}.<br>The trade is reversed the same episode.
|}

==In the manga==
===Pokémon Adventures===
In [[Pokémon Adventures]], some trade evolutions have occurred.

====List of trade evolutions in Pokémon Adventures====
{| class="roundy" style="margin:auto; text-align:center; background:#{{blue color}}; border:3px solid #{{blue color}}"
|-
! colspan="2" style="background:#{{green color light}}; {{roundytl|5px}}" | First Trainer's Pokémon
! colspan="2" style="background:#{{green color light}}" | Second Trainer's Pokémon
! style="background:#{{green color light}}" | Chapter traded
! style="background:#{{green color light}}; {{roundytr|5px}}" | Notes
|- style="background:#FFF"
| rowspan=2 | {{MS/HOME|0062|Poli}}
| rowspan=6 | [[Red]]'s [[Poli]], [[Saur]], and [[Pika]]
| {{MS/HOME|0005|Blue's Charmeleon}}
| rowspan=6 | {{adv|Blue}}'s {{TP|Blue|Charmeleon}}, {{TP|Blue|Scyther}}, {{TP|Blue|Golduck}}<br>{{TP|Blue|Machoke}}, {{DL|Blue (Adventures)|Pidgeot}}, and {{TP|Blue|Porygon}}
| rowspan=6 | ''[[PS018|A Tale of Ninetales]]''
| rowspan=6 | Accident. Returned in the same chapter.<br>{{p|Machoke}} evolves into {{p|Machamp}} from the trade.
|- style="background:#FFF"
| {{MS/HOME|0123|Blue's Scyther}}
|- style="background:#FFF"
| rowspan=2 | {{MS/HOME|0002|Saur}}
| {{MS/HOME|0055|Blue's Golduck}}
|- style="background:#FFF"
| {{MS/HOME|0067|Blue's Machamp}}
|- style="background:#FFF"
| rowspan=2 |{{MS/HOME|0025|Pika}}
| {{MS/HOME|0018|Blue (Adventures)#Pidgeot}}
|- style="background:#FFF"
| {{MS/HOME|0137|Blue's Porygon}}
|- style="background:#FFF"
| {{MS/HOME|0061|Polibo}}
| {{adv|Gold}}'s [[Polibo]]<small><br>([[Held item|Holding]] [[King's Rock]])</small>
| {{MS/HOME|0117|Silver (Adventures)#Kingdra}}
| {{adv|Silver}}'s {{DL|Silver (Adventures)|Kingdra|Seadra}}<small><br>([[Held item|Holding]] [[Dragon Scale]])</small>
| ''[[PS109|Ampharos Amore]]''
| Traded via [[Pokédex]].<br>Evolved into {{p|Politoed}} and {{p|Kingdra}}, respectively.<br>Returned in [[PS110|the following chapter]].
|- style="background:#FFF"
| {{MS/HOME|0112|Blue's Rhyperior}}
| {{adv|Blue}}'s {{TP|Blue|Rhydon}}<small><br>([[Held item|Holding]] [[Protector]])</small>
| [[File:XYLoadingMS.png|link=Silver (Adventures)]]
| {{adv|Silver}} (traded Pokémon unknown)
| Prior to ''[[PS449|Raising the Stakes with Rhyperior]]''
| Traded via [[Pokédex]].<br>{{p|Rhydon}} evolved into {{p|Rhyperior}}.<br>Rhyperior returned prior to ''[[PS582|Pinsir Glares]]''.
|- style="background:#FFF"
| style="{{roundybl|5px}}" | {{MS/HOME|0616|Whitley (Adventures)#Accelgor}}
| {{adv|Blake}}'s {{p|Shelmet}}
| {{MS/HOME|0588|Blake (anime)#Escavalier}}
| {{adv|Whitley}}'s {{p|Karrablast}}
| ''[[PS543|Abyssal Ruins]]''
| style="{{roundybr|5px}}" | Traded via [[Pokédex]].<br>Evolved into {{p|Accelgor}} and {{p|Escavalier}} respectively.
|}

==Trivia==
* All trade evolutions introduced in Generation {{gen|II}} and {{gen|IV}} are [[List of cross-generational evolution families|cross-generational evolutions]] (evolving Pokémon introduced in earlier generations).
* {{p|Porygon}} is the only Pokémon to evolve twice via [[trade|trading]]. Both evolutions require a held item, namely the [[Upgrade]] and [[Dubious Disc]].
** {{p|Porygon2}} is the only Pokémon to have evolved from trading that can evolve further.
* The {{p|Clamperl}} family is the only branched evolution in which both evolutions are achieved by trading.
* {{p|Feebas}} evolving into {{p|Milotic}} is the only case where a non-trade evolution later gained a trade evolution into the same Pokémon species.
* {{p|Trevenant}} is the only Pokémon to have evolved from trading that can also be found as a [[wild Pokémon]] in the same generation when it was introduced.
* Since [[Generation VII]], no new Pokémon that evolve by trade have been introduced, other than a [[regional form]].
** {{rf|Alolan}} {{p|Graveler}} is the only regional form with a trade evolution.

===Held items===
* Out of all items used to evolve Pokémon by trade, [[King's Rock]] and [[Metal Coat]] are the only ones usable by two Pokémon species each, with all other items being exclusively used by a single Pokémon each.
* Several items introduced between Generations {{gen|II}} and {{gen|IV}} can not only trigger an evolution when [[held item|held]] by a traded Pokémon but also have other unrelated uses when held by Pokémon in {{pkmn|battle}}. Other held items introduced from [[Generation V]] onwards are exclusively used for trade evolutions.
** In [[Generation II]], the [[Upgrade]] was the only item with no other use than triggering a trade evolution, while the [[Dragon Scale]], [[King's Rock]], and [[Metal Coat]] also had some in-battle effects unrelated to evolution. However, starting in [[Generation III]], the Dragon Scale lost its previous in-battle effect and became exclusively used for evolution as well.

==See also==
* [[Methods of evolution]]
* [[Evolution item]]
* [[Friendship evolution]]
* [[:Category:Pokémon that evolve through trading|Pokémon that evolve through trading]]
** [[:Category:Pokémon that evolve by trading with a held item|Pokémon that evolve by trading with a held item]]

==References==
{{reflist}}
{{-}}
{{Project Games notice|game mechanic}}

[[Category:Game mechanics]]
[[Category:Pokémon that evolve through trading|*]]