Tyrogue was a Pokémon owned by an unknown trainer, but the trainer abandoned him. Tyrogue started acting rough and tough after being abandoned. Kiyo noticed him, but Tyrogue fled, as Tyrogue did not trust humans. However, Tyrogue caused trouble among the human settlements, along with a Primeape and a Mankey, stealing food and giving it to hungry Pokémon. Kiyo fought Tyrogue, but amidst the battle and interference from Team Rocket, a boulder nearly fell on Tyrogue. However, Kiyo saved him and requested a combat. Kiyo personally fought Tyrogue and managed to defeat him. Tyrogue left his former ways and began traveling with Kiyo, who replaced Tyrogue's blue scarf with a red one.