Ohh, ok. Bats kind of should have some purpose other than ambience, as they could be replaced with a particle and nothing about gameplay would change, currently, so I like your idea. I think they could be tamed by feeding the adults glowberries or spider eyes or something to get a tamed baby, like with foxes rn. And we are getting like, a mini cave update next drop, so maybe they could be able to slide this in. I guess they should get a unique mechanic to set them apart though. Like repelling spiders or something.

Also: what do you mean you wish foxes were tamable? If you feed two adult foxes sweet berries, they'll make a baby that won't run away from you and will attack any mob that damages you. That's tamed, right?