Nayuta is a small boy that Ash met in a forest near Twinleaf Town. Like Ash did at his age, Nayuta dreams of becoming a Pokémon Trainer and he spends his time watching wild Pokémon. Ash's Pikachu seemed to like Nayuta right away and gave it a hug.
While Ash and Nayuta were talking, a wild Heracross appeared. Ash told to him that he caught his own Heracross earlier in his journey.