I fought tapu Koko and caught him without attempting to synchronize the nature I wanted and sadly got one that I didn't want (lax). But he is easily my favorite Pokmon of this gen.
I'd love to get a timid nature Tapu Koko! Ivs don't matter as I plan on hyper training.
I have up for grabs - (all with pokerus and at least 4 perfect IVs)
alola vulpix hidden ability -timid
Beldum - jolly
Mimikyu - jolly
Oricorio - timid
Petilil - timid