What are all the Pokemon that can be caught, but require interacting with another game to be caught?

Jan. 8, 2018

Examples include dual slot Pokemon and Spiritomb in DPPt and Giratina in ORAS. Please ignore Friend Safaris in the answer and don’t question my curiosity.

Pleaselog inorregisterto add a comment.

I talked to a few Bulbapedia editors since I asked this question. Hopefully their combined knowledge is enough to write a complete answer.E: SurskitDP: Caterpie, Weedle, Ekans, Sandshrew, Vulpix, Growlithe, Gengar, Pineco, Gligar, Shuckle, Teddiursa, Elekid, Magby, Lotad, Seedot, Sableye, Mawile, Zangoose, Seviper, Lunatone, Solrock, Spiritomb, RegigigasPt: Caterpie, Weedle, Ekans, Sandshrew, Vulpix, Growlithe, Gengar, Pineco, Shuckle, Teddiursa, Lotad, Seedot, Sableye, Mawile, Zangoose, Seviper, Lunatone, Solrock, Spiritomb, RegigigasHGSS: RayquazaBW: LandorusB2: Regice, RegigigasW2: Registeel, RegigigasXY: every Friend Safari PokemonORAS: Regigigas, Giratina, Landorus, KyuremUSUM: Rayquaza, Regigigas, Giratina, Landorus, Kyuremsource