A School Kid (Japanese: じゅくがえりComing Home from Cram School) is a type of Pokémon Trainer that first debuted in the Generation II games as Schoolboys. In Generation III, female variations started to appear and the class gained a gender neutral name. They are presented as young children carrying school bags.
Tetsuya's Volbeat was very shy towards newcomers and would usually hide inside the playground. Due to his shyness, his tail could not light up. However, after Tetsuya who took care of him started drowning, Volbeat managed to get his tail lit in order for Tetsuya to be saved. Afterwards, Volbeat invited his own kind over.