The Wii Fit Trainer is a fictional character who first appeared in the 2007 video game Wii Fit as the player's personal trainer. Players may choose from either a male or female trainer, though the female trainer has gained much more popularity courtesy of her being the default trainer in the Super Smash Bros. series, starting with 2014's Super Smash Bros. for Nintendo 3DS and Wii U and returning in 2018's Super Smash Bros. Ultimate.