[[File:Blackthorn City HGSS.png|thumb|300px|Blackthorn City]]
The quiet mountain retreat known as [[Blackthorn City]] lies isolated in the northeast. The main attraction is the [[Blackthorn Gym]], the final Gym in the region. North of the Gym is [[Dragon's Den]], a training ground for {{type|Dragon}} specialists. On Saturdays, Santos of the [[Week Siblings]] can be found here.
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{{Catch/entryhs|085|Dodrio|yes|yes|Trade|The same as the Traded Pokémon|all=One|tradenum=148|tradename=Dragonair|tradegender=female|type1=Normal|type2=Flying}}
{{Catch/footer|mountain}}
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! Items
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{{itlisth|mountain}}
{{itemlist|Smoke Ball|Held by Doris, the traded {{p|Dodrio}}|HG=yes|SS=yes}}
{{itemlist|Soft Sand|On the first meeting with Santos{{dotw|Sa}}|HG=yes|SS=yes}}
{{itlistfoot|mountain}}
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===Time for a Trade===
The girl in the eastern house is looking to trade. She offers her {{p|Dodrio}} in exchange for a female {{p|Dragonair}}. The Dodrio arrives holding a [[Smoke Ball]].
===The Move Tutor House===
There are four people in the southwest house, all of which provide valuable services regarding a Pokémon's moves.
* Move Deleter: He can help a Pokémon forget any move, even [[HM]] moves.
* Move Maniac: In exchange for a [[Heart Scale]], he helps a Pokémon remember any move it had previously forgotten.
* Grandma Wilma: When shown a {{t|Dragon}} Pokémon that is [[Friendship|happy]] with its Trainer, she will teach it the ultimate Dragon-type move, {{m|Draco Meteor}}.
* Ultimate Move Tutor: He teaches any fully-evolved starter Pokémon the ultimate move of its type; {{m|Frenzy Plant}}, {{m|Blast Burn}}, or {{m|Hydro Cannon}}.
{{sign|DPcity|title|Blackthorn City Pokémon Gym<br>Leader: Clair}}
{{sign|DPcity|The Blessed User of Dragon Pokémon}}
{{sign|DPcity|footer}}
The [[Blackthorn Gym]] uses mostly {{type|Water}} and {{type|Dragon}} Pokémon. Waters resist {{t|Ice}} and {{t|Fire}} attacks and are weak to {{t|Electric}}. Dragons take less damage from {{t|Grass}}, Fire, Water, and Electric moves, and are more vulnerable to Dragon- and Ice-type attacks. The floor has become unstable due to the lava bubbling underfoot, forcing your lead Pokémon to return to its Poké Ball. Reaching the Gym Leader requires crossing the lava on movable platforms. These platforms each have a blue tile, which causes it to rotate, and two arrow tiles, which move it in the respective direction.
[[Clair]]'s {{p|Gyarados}} can lower its opponent's Attack with its {{a|Intimidate}} Ability. It cannot make good use of its {{m|Twister}} and {{m|Dragon Pulse}} moves due to its lower Special Attack, but {{m|Bite}} builds on its already-high Attack. Both of her {{p|Dragonair}} can inflict {{status|paralysis}} with {{m|Thunder Wave}}, before executing strong moves like Dragon Pulse, {{m|Fire Blast}}, and {{m|Aqua Tail}}. {{TM|25|Thunder}} from the [[Goldenrod Department Store]] deals serious damage to Gyarados, while {{TM|14|Blizzard}} from the [[Goldenrod Department Store]] or {{tm|72|Avalanche}} from [[Ice Path]] can help against her two Dragonair. Her {{p|Kingdra}}'s only weakness is Dragon-type attacks, and can beat its target down with the powerful {{m|Hydro Pump}}, Dragon Pulse, and {{m|Hyper Beam}} attacks. Unless your Pokémon happen to know a Dragon attack, you likely have to hammer it with strong, neutrally effective moves.
Clair refuses to accept defeat. She claims that you are still not ready for the Pokémon League, and directs you to take the "Dragon-master challenge". There is a small shrine in the [[Dragon's Den]], a large cave located underneath the city. If you can reach it, she will give up the Rising Badge. Bring along a Pokémon with {{m|Surf}} and {{m|Whirlpool}}, and cross the lake behind the Gym.
==Route 45 (optional)==
==Route 45 (optional)==
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|gamename=HeartGold and SoulSilver
|gamename=HeartGold and SoulSilver
|prevsection=10
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|prevname=Goldenrod City, Route 44, Ice Path
|prevname=Route 44, Ice Path, Blackthorn City
|nextsection=12
|nextsection=12
|nextname=Mt. Mortar, New Bark Town, Ecruteak City, Bell Tower
|nextname=Mt. Mortar, New Bark Town, Ecruteak City, Bell Tower
Route 45 is a rugged route leading down from the mountains. The ravine forces the path to split and recombine multiple times, and many small ledges prevent northbound travel. The east entrance to Dark Cave is located just outside of the city, and the route eventually reaches a small lake, where it turns west toward Route 46.
Trainers with a telephone symbol by their names will give their Pokégear number to the player, and may call or be called for a rematch with higher-level Pokémon.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
Dark Cave, via Routes 31 and 46Dark Cave, via Route 45
Dark Cave (optional)
Though Dark Cave was first accessible from Route 31, but ledges prevented players from exploring the whole cave. The moves Surf, Strength, and Rock Smash are needed to fully explore the area. This cave is the only location where wild Dunsparce can be found, and one of the few places where wild Wobbuffet can be found.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
Turn west, then head south. Collect the hidden Elixir, then surf south across the lake. Grab the Revive from the southeast platform, then go west to reach TM54 (False Swipe). Head north across the lake and follow the path around to the southwest. Speak to the man in the northwest corner to receive the BlackGlasses, then head south and jump the larger pair of ledges. Check the dark rock for a hidden Hyper Potion, and step through the doorway to the Violet side.
Violet side
A Potion and a hidden Poké Ball can be found to the west, and a Black Flute is located to the south, past a small pool of water. Use Surf or Rock Smash to travel eastward to a narrow tunnel, then use Strength to move the boulder. Use Rock Smash again to reach the northeast corner, and the Hyper Potion not far to the south. Jump the ledge and inspect the east wall for a hidden Max Ether. Collect the Full Heal to the south, and the Dire Hit to the southwest, before exiting to Route 46.
Route 46 (optional)
Route 46
The rugged mountain road of Route 45 comes to an end in Route 46, as the mountains give way to smaller cliffs. To the west, a small grove of Apricorn trees grows in a secluded field. Head south through the gate, and cut through Route 29 to return to New Bark Town.
Trainers with a telephone symbol by their names will give their Pokégear number to the player, and may call or be called for a rematch with higher-level Pokémon.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
Only select Trainers can enter the Dragon's Den, a place for training and meditation. The Dragon Master lives inside the shrine on the south side of the cave. Be sure to enter with no more than five Pokémon!
Trainers with a telephone symbol by their names will give their Pokégear number to the player, and may call or be called for a rematch with higher-level Pokémon.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
Climb down the ladder to the main cavern. Fight Ace Trainer Kobe, then collect the hidden Revive to the west and the Calcium to the southeast. Surf west to battle Ace Trainer Piper and find a hidden Max Potion. Swim southwest to fight Twins Clea & Gil, and pick up the Max Elixir nearby. Use Whirlpool to calm the waters, then sail east past the shrine before turning north. Grab the Dragon Fang from the east side, then backtrack and enter the shrine.
Shrine
The Dragon Master realizes right away that you were sent here by Clair. He gives a short test to determine your attitude towards Pokémon. Avoid the negative answers to pass the test.
Question
Answers
1
What are Pokémon to you?
Ally
Junior
Friend
2
What helps you to win battles?
Strategy
Training
Cheating
3
What kind of Trainer do you wish to battle?
Weak
Strong
Anyone
4
What is most important for raising Pokémon?
Love
Violence
Knowledge
5
Strong Pokémon. Weak Pokémon. Which is more important?
Strength
Both
Weakness
Clair appears, expecting you to have failed. She refuses to believe the truth, until the Dragon Master steps in. He orders her to accept her defeat, and threatens to tell Lance of these events. She hurriedly awards you the Rising Badge, which ensures obedience from all Pokémon and enables the use of Waterfall in the field. The Master scolds her, and she leaves quickly. Speaking of waterfalls, the Master mentions a huge waterfall, deep in the Whirl Islands, where Lugia is said to rest, but reaching it requires a Silver Wing...
Upon exiting the cave, you receive a call from Professor Elm, asking you to visit the Lab. Before leaving town, re-enter the cave and speak to the Master again to receive the special Dratini.