Poké Ball
From Mariopedia, a wiki on Mario, Yoshi, Wario, Donkey Kong, Super Smash Bros., and more!
Pokéballs are items in the Super Smash Bros. series that when thrown, will release a random Pokéball out of the ball, say its cry, and attack. Very, very rarely, the player will encounter a Pokéball such as Mew or Celebi. These Pokéball don't do any damage to any body, they just fly off screen. However, after the battle, the player will get a huge score for seeing that Pokéball.
A trophy of a Pokéball can also be obtained in Super Smash Bros. Melee.