Through some unknown means, Ash and Serena are transformed into a Pikachu and a Fennekin and diapered up. What's more, they've been mentally regressed into thinking that Pikachu and Braixen are their daddy and mommy as the two former humans both having playtime together.
Pikachu and Braixen are both happy to see how much fun the two new Pokémon are having together, but it looks like they're both in over their heads as both Ash and Serena show off their diaper filling skills. They're gonna need some bigger pamps for their big babies...