Pikachu & Pichu
Under most circumstances, a trip to the big city would be cause for excitement for a Pokémon with any sense, but for Ash’s Pikachu specifically, said trip meant being confronted with a pair of its un-evolved peers who found delight in the idea of Pikachu being fatally hurt. [Editor’s Note: What? -Jill P.] They meant well, to be sure, but the Pichu Brothers’ earliest appearances, while delightful, were terror incarnate.