I was thinking it'd be great if I could use a bracchus in the higher level areas, but a single kit is easier to use.
So how about an item that changes the stats of a wolf to be a different wolf species? I was thinking it could be like a "battle token" and could have the stats/abilities of a kit or any other wolf species, so multiple tokens available of different wolf types. That way everyone can use the wolf/species they prefer and still be able to go in with one wolf and a companion they prefer for the campaign. :D
I hope my idea was helpful. :)