A Trip Down Memory Train!
On their way to Anistar City, Ash & co. get ambushed by Team Rocket in a forest. While they managed to thwart Team Rocket, they ended up stuck in one of their classic pitfalls. While trying to work their way back up out of the ground, Bonnie notes that something similar has happened to her and Clemont before. That was the time that they met Bunnelby