Pichu

Pichu is an Electric-type baby Pokémon introduced in Generation II. It evolves to Pikachu when its Friendship stat reaches max level.

Character description
Pichu is a very small, plump, yellow rodent-like Pokémon. It bears a similar appearance to its evolved form Pikachu, but varies in a number of ways. Pichu has diamond-shaped ears on the top of their head, with the edges being black and the interior yellow. Underneath its head is a black pattern, that somewhat resembles a collar. Its tail is completely black, and resemble a small lightning bolt, similar to its evolved forms, which are larger. Pichu also has round, pink sacs on their cheeks, used for storing electricity.

Pichu has the special ability Static. This allows for a 30% chance that an opponent will become paralyzed if it lands a physical attack on Pichu. Pichu, like its other forms, is capable of storing electricity in the pink sacs on its cheeks. Being a baby Pokémon, however, Pichu can not store as much electricity as its evolved forms. It will shock itself if any electricity leaks out of its cheeks.

As a playable character
Pichu mainly appears as an unlockable playable character in Super Smash Flash 2, as revealed on Day 4 of Super Smash Con 2017, serving as a clone of. Similarly to its appearance in Super Smash Bros. Melee, for every electric attack it deals, Pichu receives recoil damage, though unique to Super Smash Flash 2 is that once Pichu reaches 50% and above damage, it will enter its "Discharge" state, where some of its electrical attacks will deal more damage and its special moves will act differently.

As a non-playable character
In addition to its role as a playable character, Pichu's second role in Super Smash Flash 2 is that of a non-playable Pokémon that can be released from a Poké Ball. The Poké Ball Pichu is considerably smaller than the playable Pichu and will use Thunder Wave to damage nearby opponents.

Trivia

 * Pichu and Sandbag are currently the only characters in the Super Smash Flash series to serve both a playable and non-playable role simultaneously.