There's one that happens in the postgame wherein you can try beating Overlord Zetta and possibly win. To put this into perspective, he's the most powerful overlord in the entire Nippon Ichimultiverse, and he's at his full power, AND YOU CAN KICK HIS ASS!
Flonne's big entrance, as goofy as it is (typical for her), is pretty sweet. She shows up in a Humongous Mecha modeled after herself, announces The Power of Love, and then harnesses prayers around the world to push the frigging moon back into orbit.
Fenrich: What will praying do? What will it change? What kind of help will that be!?
One has to wonder what ratio of utter delusions, Unstoppable Rage, and sheer determination allows Fuka to be as fucking dangerous as she is, but it was pretty much narrowed down to those three ingredients (and maybe some actual acceptance of Desco) when she and the Hades Party fought - and defeated - Des X. Twice. Not only does the Token Human literally pulverize the monstrosity that shamed her family (by casting Desco into Hades and killing Fuka herself), but she has her final technique (Prinny Kaiser XX) unleashed by anger alone.
Speaking of which, there's also the conversation that led up to it. Extra credit to Artina for stalling additional hostilities long enough to let it flow.
During the Netherbattle Tournament, Prier takes up Gig's challenge and gives him one of her signature uppercuts. However, while Gig says it hurt, he barely even flinches. Gig then returns the favor and sends Prier hurtling across the stage!