Pokémon - I think you're onto something...

I'm gonna call it specially 6th gen stuff.

"ASH, I can't believe this greninja has bonded so well with you. I think it may be closer to you than Pikachu!"

"Yea what ever GOOD BYE GRENINJ- Hey wait, I didn't release it yet where did it go?"

Meanwhile in the bushes, Serena carries an unconcious Greninja to her Yandere-den, the Yanden.