I'm trying to find out who the favorite characters of one of my friend's is, but he's confusing me with the info he's given me, so could someone help please 😭

he says they're two obscure characters from another universe (he hasn't told me which one) who are Mobians- one is purple and the other is brown- he's also refusing to tell me what type of Mobians they are since that would apparently give it away 😭