- The entirety of the third act of the Season Two finale.
- Monkeyman!Chiro attempting to bring Antauri back.
- Watching Sprx have a break down as he watches Nova get sucked into a wormhole, listening to her cries for help when he can't do anything to save her, is absolutely heartbreaking.
- Made even worse when you realize he'd been trying to confess his feelings to her not a scene earlier. He'd been this close to finally telling her, and then she literally slips through his fingers, presumably forever.
- Sprx turning evil could be considered this to some people, too.
- Watching Sprx electrocuting Nova while also threatning to magnetically tear her apart if the Monkey Team so much as twitches.
- Valina's Dark and Troubled Past and her unfair death.
- The Alchemist's last words to Nova are gutwreching, knowing what he was struggling with.
"Forgive me, dearest Nova. I won't forget you, but it is imperative, that you forget me."
- To elaborate: Skeleton King was the Alchemist, a kind magician and sorcerer, who got corrupted by evil and created Super Robot Monkey Team to stop him.