Top 10 Differences Between Pokemon Red/Blue and Pokemon FireRed/LeafGreen

1Charizard can't learn any Flying type moves in Red, but can in FireRed


2Pokemon FireRed has Dark and Steel types, Pokemon Red didn't


3The starter Pokemon can learn some moves faster in FireRed than in Red


4Psychic type Pokemon are immune to Ghost type Pokemon in Red while Psychic type Pokemon are weak to Ghost type Pokemon in FireRed


5A couple of moves had near endless critical hits in Red, but in Fire Red those moves had a critical hit once in a while


6Charizard was weak to Ice type moves in Red, but in Fire Red Charizard is neutral


7You have more to do in FireRed than Red


8There's a VS Seeker in FireRed, there's none in Red


9The graphics are easier to see in FireRed than in Red


10In FireRed, you get to catch some generation 2 Pokemon, in Red there's only generation 1 Pokemon