Welcome to my first Pokémon Lateral Thinking Puzzle! This will be the hardest puzzle you have ever taken.
Puzzle:
Ash's Pikachu managed to beat a Raichu. During the first try Raichu beat Pikachu, but on the rematch Pikachu actually beat Raichu. Why/How?
I will only answer Yes/No/Irrelevant questions, so feel free to ask.