(let's just say phantump in human version is he/Them or probably a non binary boy)

In the Pokemon world, it's really tragic of how you lost you're friend "Gustin" during childhood before his disappearance

You're now grown up, got you're first Pokemon companion and team you roam In the forest region to catch shiny Pokemon

The deeper you go the eerie it gets you got lost in the woods,no way out until you heard a crack not from a trunk or a stick but a Pokemon

As you went deeper, under the fallen log it's a phantump. As you lean closer to see it's "Gustin?" Phantump (or Gustin) looks at you with a eyes that says "You came back, I'm so glad" he looks twice younger as a child

"They opened they're mouth (Y/N), I remember you...do you?"