Edit: wait did you just mean a bundle where you could choose? I thought you meant a bundle like skywars lmao
Do you think they should be varied or related? I think having varied would make it more interesting.
Maybe have a park ranger or tamer* for the costume.
For the mount, idk a horse? a bird (prolly better as a pet tho)? a TNT Yeeter Mount ? self ad get rekt
And for the pet I was thinking a parrot, and it could come in the 5 parrot colours in vanilla to go with other pets.
*tamer like biomes and builders skin packs (i think that’s what they’re called)