He'll probably bring it up once spring comes and it's not wintering in his PC Box, but as long as he's convinced that Raz will take good care of it it's his. Or rather, he'll let the Sentret travel with Raz, because no one can own living things.

Sadly for Raz, Apollo's a psychic too, just only with animals (and plants... somehow...). He also uses telekinesis later on in his canon (he picks up a lake) but for now just weak telepathy. Apollo will be interested to meet someone else who can talk to animals the same way that he can though.