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Move types which are very good on {{{1}}}: Water, Grass
Move types which are good on {{{1}}}: Fighting, Ground, Ice, Steel²
Move types which are bad on {{{1}}}: Fire, Flying, Normal, Rock
Move types which are very bad on {{{1}}}: Poison
Move types which don't effect {{{1}}}: Electric
All other move types are normal effectiveness on {{{1}}}.
¹ – Red/Blue/Yellow only
² – All other Pokemon games