>>35557832Either don't give it 4 attacking moves given its ability, don't give it an insta-boost to all stats, or don't make it no more than levels higher than the totem pokemon you fight right before it.
At least with the pokemon league you're defeating opponents between the difficulty spike to close the gap. This just expects you to have arbitrarily grinded for Totem Kommo-o about 10 levels higher than it.