Core series

As has been indicated in the past, not every Pokémon in the world has been discovered yet, and regions to which unknown Pokémon are native will be revealed gradually.

Currently, there are four generations of Pokémon games, each with their own set of then-new Pokémon, moves and several other things that have become the pattern of the main series so far. Although nothing is known at this time about Generation V or beyond, the patterns which have applied to all four current generations, are expected to continue to hold true in the future.

What is so far assumed from the patterns that have run from Generation I to the present about Generation V and beyond is as follows:

• Initially, there will be two versions of the new game, which will differ in capture rates and version exclusives. A more extensive third version will be released some time later, in which most Pokémon previously exclusive to one of the two versions will be available, but other Pokémon found in both versions will be missing.
  • Evidence: The three-version formula has been used in every generation, with the sole exception of Pokémon FireRed and LeafGreen (to which the two-version formula does apply).
• A new region will be explored. It will be geographically similar to a real-life region in Japan.
  • Evidence: Each of the four generations has been centered in a new region relative to its time: Kanto in Generation I, Johto in Generation II, Hoenn in Generation III, and Sinnoh in Generation IV. The similarities to Japan's regions are noted here.
• A previously unknown Pokémon professor will reside in this region and have new Template:Type2, Template:Type2 and Template:Type2 Pokémon available for the player to select for his or her adventure. The professor will be named after a tree in the English version.
  • Evidence: Professors Oak, Elm, Birch, Rowan and their starter Pokémon.
• More new Pokémon will be introduced. Some may be evolved forms or pre-evolutions of Pokémon now known. The amount of new Pokémon introduced will likely not be below 100 or above 151. Specifically, a dual-typed Normal/Flying bird Pokémon will be introduced along with a rodent based Template:Type2 Pokémon.
  • Evidence: Each generation after the first has introduced at least two Pokémon related to those of previous generations. The amount of Pokémon released each generation was 151, 100, 135 and 107. As for the birds and rodents, in each generation there has been one of each introduced:
    • Generation I: Pidgey and Rattata. Spearow was also introduced in this generation.
    • Generation II: Hoothoot and Sentret
    • Generation III: Taillow and Zigzagoon
    • Generation IV: Starly and Bidoof
• The new regional Pokédex will begin with the starter Pokémon and their evolutionary kin as #001-#009, in the order of Grass-Fire-Water. It will lack at least some Pokémon. The National Dex numbers of new Pokémon will start with #494 for the Grass-type starter and continue on at least up to #593 if at least 100 Pokémon are added.
  • Evidence: Hoenn's regional Pokédex leaves out 184 Pokémon. Sinnoh's regional Pokédex leaves out 342 Pokémon.
• There will be eight Pokémon Gyms and an Elite Four, of which each will specialize in a specific elemental type, and a Champion at the end of the Elite Four. There will also be an evil team that the player will battle and eventually defeat after a battle with its leader.
  • Evidence: This is part of the standard version formula.
• There will be an anime season or series. In it Ash will travel to a new region, bringing his Pikachu, and will capture the resident bird Pokémon and at least one Starter Pokémon. He will have a team consisting of Pikachu, the bird Pokémon, a Template:Type2 Pokémon, a Template:Type2 Pokémon, a Template:Type2 Pokémon, and another Pokémon. He will challenge the Gyms of the region. He may receive new traveling companions, and will get a new outfit made by his mother at the beginning of the new series
  • Evidence: This has happened to every main game and generation since Red and Blue in Generation I.
• There will be some new manga produced, some Pokémon Special chapters written, and new TCG cards created.
  • Evidence: This has happened to every main game and generation since Red and Blue in Generation I.
• Pikachu will be found in the new region.
  • Evidence: The series mascot can be caught in every portable Pokémon game, except Pokémon Yellow where it is the starter.
• The evolutionary families of Geodude, Abra, Zubat, Machop, Psyduck, Goldeen, Tentacool, and Magikarp will be included within the new region.
  • There has not been one sea route yet where Magikarp or Tentacool/Tentacruel hasn't been found. Magikarp is always catchable with the Old Rod as well. Goldeen is a common fishing Pokémon as well. Zubat and Geodude or their evolutions can be found in nearly every cave, along with Machop or Abra occasionally. Psyduck is common around lakes or in Safari Zones.
• There will be at least one legendary trio in the next generation, as well as at least one Über legendary and one event Pokémon.
  • Evidence: Generation I has exactly one of each of the above, and all subsequent generations have expanded on this number in some way.
• It is likely that the new generation will be playable on a new handheld game system.
  • Evidence: With the exception of Gold and Silver, every new generation was released for the newest Nintendo handheld console.
    • Red, Blue and Yellow, then Gold and Silver for the Game Boy.
    • Crystal for the Game Boy Color.
    • Ruby, Sapphire, Emerald, FireRed and LeafGreen for the Game Boy Advance.
    • Diamond and Pearl for the Nintendo DS.
• There will be at least 1 pokemon that is roaming the new region per game.
  • Evidence: With the exception of Generation I, every new generation has have at least 1+ pokemon roaming the new region per game
    • Generation II = Raikou/Entei/Suicune
    • Generation III = Latias/Latios
    • Generation IV = Mesprit/Cresselia