Battling - Pokemon Fire Red and Leaf Green Wiki Guide - IGN
If a Pokemon was created which had every type, what would it be weak to? Would it be any good? - Quora
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I just found out that apparently in gen 1, psychic types were IMMUNE to ghost types rather than weak to them. So with that said...can someone please explain to me why a
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Pokémon FireRed and LeafGreen/Types & Stats — StrategyWiki, the video game walkthrough and strategy guide wiki
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The 5 Best Psychic Pokemon: FireRed/LeafGreen (+ movesets)