"Hagrid no, that's a Stufful!"
Hagrid turned his attention from the small bear-like creature he had been about to pick up to the young wizard showing him around Akala Island. "Now 'Arry, I'm sure this little one don't mean no harm."
"That's not it." Harry's voice was filled with as much frustration as concern. "Stuffuls and are like Hippogryphs. They're very proud and react poorly to disrespect. And they consider few things more disrespectful than being touched without permission. "
Hagrid yanked his hand back. Lots of folk made good creatures out to be far more dangerous than they were, so he rarely paid attention to such warnings. But disrespecting a critter was something he would never do. "Sorry about that, I meant nothing by it." He apologized, giving the Stufful a bow like he would one of the school Hippogryphs.
The pink creature seemed to regard him for a moment then made a soft 'Fel' noise.
"He's letting it slide, as long as you don't try it again." Harry explained. "It's actually a big problem with tourists who try to pick them up and get hurt. I've known this little guy since he was born and I wouldn't so much as pett him without express permission." Which he wouldn't be asking for today. "Though I hope some Ribombee honey might cheer him up."
"Stuffel!" The little Pokémon bounced up and down.
"Okay, but we’re saving some for Mama."
"Mama?" Hagrid asked. Harry had referred to Olivia as his sister after all.
"Bewear, Stufful's mother." Harry explained, opening one of his jars and handing it over to the Stufful. She found me one day when I was in the woods crying. Some of the kids had been teasing me about not having a proper Mom and well..." He shrugged. "I think she decided she would be my Mom. And trust me, you haven't seen a 'Mama Bear' till you've met a Bewear. They're amazing mothers. They don't have the aversion to touch that Stuffel do, but they have to be careful because they're so strong they could accidentally hurt people just trying to be friendly.
Hagrid couldn't help the smile on his face and Harry just talked about Bewear and Stuffel. It did his heart good to see the lad so interested in magical creatures. He only hoped Harry would be taking CoMC in his third year. He'd hate to see that much love and passion wasted.
So the premise of this one was Celebi was taking an outing through dimensions, came across a baby in a basket, looked into his future, and noped him out of there.
He grew up on Akala Island, raised by Olivia. Sadly there’s a bit of Destiny in play, so he has to go to Hogwarts. Those in the know (some legendaries, the Kahuna’s) come up with the story of the Pokemon world basically being a reserve for magical animals, hidden from the wizarding world as the magical community is hidden from the mundane one.