Now I'm starting to think another Totem Pokemon would've probably be better off than Kommo-o as the final one. I'm thinking maybe Drampa for Moon and Tortunator for Sun. That would make for some interesting Totem matches, perhaps.
I know!! Imagine how much more fun and challenging the last Totem Battle would be. :o And the Pokemon they would summon. @__@
Mimikyu. Its typing makes it weak to only one typing, a type that is also weak to itself, meaning that Mimikyu has no problems killing other Ghost types. Its also got other Ghosts for backup, meaning that it could easily dunk your Ghost even harder. The other Totem Pokemon went down pretty easily, but this one was strong and it had some decent defenses.
Mimikyu is also weak to Steel, and while you do get the Steelium Z alongside the Electrium Z after clearing Sophocles' trial, the issue is not a lot of the Pokemon obtainable by the time you do this trial even learn Steel moves in the first place.