is it for everyone, including villains or just the crew?

if it’s just the crew 

if we are talking about personality I’ll say the bros could go two different ways 

Martin: Otter or dolphin both playful and smart 

Chris: T-devil ( with a character to back their size) or Racoon (smart agile) 

but they both can also go with African Wild Dogs, Orcas or Wolves since they work in teams/packs and are smart.

Koki: bear (strong and protective)

Aviva: African Gray Parrot or Raven (both extremely smart birds capable of solving problems)

Jimmy Z: i think for JZ it’s a tie between Opossum and sloth but I’m not really sure