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Porygon2 is a Normal-type Pokémon that first appeared in Pokémon Gold and Silver. It evolves from Porygon when it is traded with an Up-Grade, and as of Generation IV it can evolve to Porygon-Z when traded with a Dubious Disc. In Super Smash Bros. Melee, it has a chance of being summoned from a Poké Ball and attacks by using Tackle; as soon as it is spawned, it dashes a short distance horizontally before disappearing, dealing moderate damage and a huge amount of knockback (in the opposite direction of Porygon2's tackle) to any opponents caught by it.