I've come to reason that the game doesn't make sense with the anime... Regice has uber Special Defense, it would never be KO'd by a little Pikachu, Latios could have easily OHKO'd a Pikachu, and Rhydon would have laughed at a Thunderbolt. Losing to a Snivy is more logical, since Snivy resist Electric-type moves, but considering the things Pikachu has defeated, it's odd to have lost to a Shivy. Idk I never even try anymore to connect Games with Anime