I can't remember what they're called, but in Golden Sun: Dark Dawn there is two:
- An optional boss that if you defeat him he'll become a summon. Thing is though, he summons a lot of these balls that will consume your summons, curse you, heal him, attack you, protect him, and the like. I tried to beat him three times I think, all of which took over an hour. Gave up after that.
- The final boss (at least I think it's the final boss). It's the guy that's morphed from the three guys you were just battling that were already a ***** to fight. And due to the fact that he/it occurs right after a hard ass fight, you can't go to resupply any consumables you used, which you did, and nor can you go off to level up or do anything else. He does shit loads of damage to multiple people in your party, and it has obscene amounts of HP. I spent over an hour and a half on him and got nowhere, so I quit.