If they have pets , what would their animal pet be , if have or not.some kind of,scary beast, alien beast or something fluffy and small?
That's a good question! I try my best to give the best headcannons as possible.
Swap don't mind any animal. But I think he would have any fluffy animals, especially cats and dogs (even though he's allergic to it)
B would certainly adopt a service animal due to his blindness. However, he has a special magic that he can "see" through with a monster's eyes that can handle his magic. (Based of this the "seeing eye") However, he will NOT adopt cats, never (he consider cats as bad omen, based of this)
Starts is the same as Swap, loves every monsters. But I think he would adopt an alien just to get to know its species and origins. But would take care of it always.
Maestro would adopt a bird and would always cares and washes it everyday (keep in mind that they're germphobic)
Swapfell would certainly adopting any animal even the beast just because he can. Probably for experiment.
Fell do like dogs, he just don't like them in the house. He won't adopt any pets though as he just don't like pets in general.
Unfortunately Wingding would not adopt anything. Wingding is WAY too busy taking care of any animal in general (even himself)
This is more clear statement (Ik it's more monster references but I think it's also clear too)
(*Headcannons only! I'm not Bunnymuse nor Flotts (for Maestro) to confirm it. But let me know your headcannons)
Edit: My mistake, Fell actually won't adopt anything. Based of this. Sorry.