I'm not sure how hydrus pet work if you adopt them, but if anyone is interested, Datsik if UFA.

Starting stats, 7 treasure slots.

I want to make space for another pet.

Ping me ;)

The pet just turns to a common pet when it leaves your account I'm pretty sure. Datsik is awesome, love the name. Wish I had room. Goodluck!

Actually it stays Hydrus if sent through the friend option :)

Good luck adopting out!