Shinji is also set to reappear in this episode. He last appeared on TV, where he was revealed to have already obtained the eight Sinnoh badges.
Satoshi's Moukazaru was originally one of Shinji's Pokémon until he decided to release it. Satoshi then took it under his wing. In a battle with Shinji, it activated its abilityRaging Flames, but the power was too much that Moukazaru, still a Hikozaruthen, kept on attacking even when the battle was over. Eventually, Satoshi was able to calm down his Pokémon. The screenshot on TV Tokyo somewhat implies that a similar event may occur in the upcoming episode.