Biotics in Mass Effect - In Mass Effect 1 biotics are essentially space magic that allows you to throw enemies around at will and even provide protective and damaging abilities that enemies can’t resist making any biotic class in ME 1 overpowered as hell. But in Mass Effect 2 if you play on any of the higher difficulties all enemies have protective health types that keep enemies from being affected by biotics, making them much harder to use effectively.
Psychic types in Pokemon - Psychic types in gen 1 were extremely powerful due them mostly having high speed and special attacking stats and having few weaknesses and those weaknesses not being strong. As well as the fact that no type resisted psychic in gen 1. Every ghost type was a poison type and would get 1 shot and bug types were mostly weak with no strong offensive moves. But in gen 2 they introduced steel types, which resisted them and dark types which were immune and could do super effective damage back