Given how the show otherwise aces The Bechdel Test, why do we never see any female ogres? Well, we learn in "You Snooze, You Lose" that Igthorn doesn't have much respect for women, especially when it comes to combat.
In the series Grand Finale, a purple ogre's power-up he gained from Gummiberry juice ends while he is keeping a whole well over his head. This results in him being buried alive under the well. No one, however, seems to care about him and it's not revealed if he gets rescued by others or not.
At the end of the season 2 episode "For Whom The Spell Holds", while the Gummis have rescued the Great Book from Zorlock the Wizard, he has already used it to break the locking spell trapping him underground. So, what's going to stop him from recovering from his backfiring spell and coming after them again? ...Unless the spell actually kills him...
In season 1, Episode 2, the villain Angelo Davini had miniature statues of Mickey Mouse and Donald Duck make a cameo appearance in his wagon. At the end of the episode the animals he petrified came back to life and started to attack him. That means that miniature versions of Mickey and Donald must have been kicking his butt off screen.