Super Casual Trainer
I could see Incineroar taking down Darkrai after it's been softened up a bit, and if Kukui gets Tapu Koko, they can take down Latios as well. It's even more certain if Kukui gets to use a single Z-move.Kukui vs Tobias
Tobias has a full team of legendary Pokemon.
He's definitely not going further than number 3.