|Gender||Female or male.|
|First appearance||Wii Fit (2008)|
|Last appearance||Super Smash Bros. for Nintendo 3DS / Wii U (2014)|
The Wii Fit Trainer is a character who appears in every game in the Wii Fit series. He or she offers the player direction and evaluation, the player is instructed to perform the center of balance activity by precisely imitating the trainer's actions. The trainer advises the player to maintain the throughout the activity, requesting that it not move outside a particular threshold (usually indicated as a yellow circle).
- The female trainer appears as a playable character in Super Smash Bros. for Nintendo 3DS / Wii U : Her attacks include various exercises from the game Wii Fit and her Final Smash, "Wii Fit", sends a barrage of multi-colored exercise images in front of her, damaging opponents. The male version of the Wii Fit Trainer also appears as an alternative outfit.