Porygon2 uses Tackle as its attack, much as the original Porygon did in SSB's Saffron City. Once released, Porygon2 will instantly dash a short distance horizontally then disappear. Any character that makes contact with Porygon2 when it's moving will take significant damage and a huge amount of horizontal knockback; surprisingly, targets are sent in the opposite direction Porygon2 launched itself. However, if an opponent is grabbed, there will be no knockback. The chances a character has of recovering from this attack is very slim. Porygon2's attack does not harm the summoner.
Porygon2 features as a collectible trophy, unlocked as one of the 100+ trophies that can be collected randomly during normal play, such as in the Trophy Lottery and throughout the various Single-player Regular Matches. It reads as follows:
Representing the next step in technological progress, this Virtual Pokémon is a higher-powered version of the man-made Pokémon, Porygon. Compared to the sharp edges of its relative, Porygon2's body is extremely smooth and rounded. In battle, it utilizes a special move called Conversion 2 to alter its type.