第37話: サトシはコルニとのジム戦に向けてフカマルとハチクマの訓練中にトレバンの拉致を受ける。

37

While practicing for his upcoming Gym battle against Korrina with Hawlucha, Froakie, and Clemont, Ash is kidnapped by the Elder Tree Pokémon Trevenant, leaving Froakie and Hawlucha to trust each other in saving Ash, as Trevenant keeps the others at bay with its power over the forest. (Source: Wikipedia)