>>58996463"Many years ago when I was a trainer, I caught a Mankey, and he was by my side all the way to the Elite Four."
"My grandson followed in my footsteps and caught his own Mankey, and it learned moves that I had never heard of."
"Even if you think you know everything about your Pokemon, who knows what the future will bring?"
Just drop some shit like that, Pokemon are strange and mysterious creatures, having things about an entire species change over time would not be an unusual thing.