- For fighter info, see Pichu (SSBM).
Pichu is described as small bipedal mouse with an oval-shaped head and large, black, arrow-shaped ears. The pre-evolutionary form of the popular Pikachu, the Pokédex explains that the electricity pouches on its cheeks are still small and not able to store much electricity yet; in spite of that, it is not yet skilled at storing electricity. It may discharge power accidentally and spontaneously if amused or startled, and vice versa. Despite its small size, it can zap even adult humans, but it surprises itself whenever it does so. When it plays with other Pichu, they may short out electricity with each other, creating a shower of sparks, startling them and causing them to start crying. It gets better at holding power as it grows older, where it starts playing with other Pichu by touching tails and setting off sparks in apparent mutual tests of courage. It charges itself with electricity more easily on days that either have very dry air or has thunderclouds, in which case you can hear the crackling of static electricity coming off it.
In the games, Pichu only evolves into Pikachu when it reaches a certain level of happiness with its Trainer. Its Pokédex description claims that it is inexperienced with its ability to handle electric-attacks and occasionally inflicts damage to itself, though this does not actually occur in the Pokémon games. It however, has been demonstrated in both the Pokémon animated TV series and in Super Smash Bros. Melee.
In the game series, as the pre-evolved form of Pikachu, Pichu is less powerful than its evolved counterpart, and can't learn some moves that Pikachu can. However, the only way a player can obtain a Pikachu that knows Volt Tackle is through breeding a Pichu.
In Super Smash Bros. Melee
As a playable character
- Main article: Pichu (SSBM)
Pichu makes a playable appearance in this game, albeit as one of the weakest characters, but faster and slightly stronger than Pikachu. Melee is notably the only game that is true to Pichu's Pokédex description of harming itself with its own electrical energy: whenever Pichu performs an attack that involves electricity, it takes a few percentage of damage. It is also the lightest character in Melee.
A Tiny Mouse Pokémon identifiable by its big ears, Pichu evolves into Pikachu. It's not very skilled at storing up electrical energy and will sometimes discharge it if jarred. Although it's small, it has enough electrical power to give even an adult quite a shock. It's often startled by its own power.
- Pokémon Gold & Silver, 10/00
As a Trophy
Pichu makes a cameo appearance in Brawl as a collectible trophy. It is obtained by completing All Star mode without using a continue. Pichu and Mewtwo were the only two non-returning Melee characters to have trophies in Brawl, and neither trophy description makes any reference to their appearances in Melee in much the same way that none of the main character trophies in Melee and Brawl make any reference to their appearances in any Smash games. This suggests that Pichu and Mewtwo were both considered for Brawl, and that by the time it was decided to cut them out, their trophies had already been designed.
A Tiny Mouse Pokémon. Because its electric cheek pouches are still small, it cannot store electricity yet. Pichu has been known to flaunt its courage by touching tails with others and setting off sparks. It is easier for Pichu to build up electricity when the humidity is lower. Pichu will evolve into Pikachu.
- Pokémon Gold/Silver
- Pokémon Diamond/Pearl
- The wall jump ability used by Pichu in Melee is usable by Pikachu in Brawl. That, along with the fact the blue goggles Pichu wore as an alternate costume in Melee appear for Pikachu in Brawl and Pikachus can only learn Volt Tackle though the Pichu stage, have led players to joke (or believe) that Pikachu in Brawl is the evolved Pichu from Melee.
- Pichu, along with Young Link, Roy, Dr. Mario and Mewtwo, does not return in Super Smash Bros. Brawl as a playable character, was possibly replaced with Pokemon Trainer. However, one of Pikachu's outfits feature blue goggles very similar to the ones Pichu wore in Melee. While partial programming information for most fighters that appeared in Melee but not Brawl has been discovered in Brawl's code, Pichu is one of two characters (alongside Young Link), to not have any programmed data at all.
- It is commonly assumed that Pichu was included in Super Smash Bros. Melee, to promote the then-new games Pokémon Gold and Silver and Pokémon Stadium 2; a similar case was confirmed with Roy, who was put into SSBM for advertising purposes, as Fire Emblem 6 was about to be released in Japan.