Goh first encountered Stantler along with its partner, Misdreavus, while attempting to climb Bell Tower in search of the Legendary Pokémon Ho-Oh during his first visit to the Johto Region. Upon seeing Goh and the rest of the group trying to climb the tower, it used its horns to trick them with various illusions. Goh managed to put an end to Stantler and Misdreavus' tricks by capturing them in Poké Balls.
None of Stantler's moves are known.
At the Cerise Laboratory