Poké Balls allow the player to call forth a randomly chosen Pokémon. The Pokémon will usually have a direct influence on the battle by attacking opponents, but some only cause status effects, act as reflectors, or do nothing to change the battle.
However, unlike Assist Trophies, the Pokémon is not automatically summoned when the player picks it up. In order for the Pokémon to appear, the player must throw the Poké Ball. This also means that they can be thrown at opponents. The Poké Ball must land in order to release the Pokémon inside it.
List of Pokémon that are released from Poké Balls
These are the Pokémon that are randomly released after opening a Poké Ball. The rarity on whom a Pokémon may appear varies:
Porygon, Porygon2 and Porygon-Z use Tackle, which make them rush rapidly towards one side striking any opponents on their path. They differ in that, the higher the Pokémon in the evolutionary line Pokémon is, the more damage and knockback it will deal, as such, this also affects the rarity chances it has to appear.
Shroomish stays in one place and periodically releases a random dust emission that has a corresponding effect on opponents that come close to it. Stun Spore paralyzes any opponent, Sleep Powder causes the opponent to fall asleep, and Poison Spore deals poison effect.
MissingNo. covers the entire screen with a Windows "Blue Screen of Death", leaving players unable to see each other and the stage they are fighting in.
Poké Balls are the most important items in the core Pokémon games and several spin-offs, where they are used by Pokémon Trainers to catch wild Pokémon, store caught Pokémon and conveniently carry them around. Several different types of Poké Balls exists, which mostly increase the likelihood of catching a wild Pokémon in specific conditions. During battles, Pokémon are sent out by trainers by throwing the Poké Ball into the battlefield, which releases the chosen Pokémon with a burst of light.
Alongside Onix, Yanma, Unown, Plusle and Minun, Flygon, Vespiquen, Marill, Slugma and Chansey, Togepi can be found within the game's files, this could be, however, the leftovers of its cameo in the intro for v0.9. Whether it will appear in the game itself is unconfirmed, as is the same with all of the other aforementioned Pokémon.
Gligar initially ported its original purple coloration it had from Generation II to Generation IV when it was first implemented into the game. This has been changed to its current pink coloration. Contrary to popular belief, Gligar never used its shiny coloration at any moment.
Due to complications with some bugs, the Poké Balls, Assist Trophies, Bumpers, and Explosive Tags were disabled on demo v0.9b and were added back in patch 0.9.1.1965.
Out of all the Pokémon that can be released from a Poké Ball, only Charizard and Pichu are playable characters in the official Super Smash Bros. games.