Disgaea 3: Absence of Detention

When you’re trying to pass Bills in Homeroom, sometimes you’ll get denied. From here, you can give up or persuade by force. Using the persuade option leads to a battle against all the voters who gave you a Nay. You’ll have to win the battle to get the approval and the trophy.

Just a word of warning on this one...some of the voters can have really high levels, so if you’re going for this trophy, make sure you’re prepared. One other option is to scout out the high-level voters and bribe them to make sure they're really likely to give you an Aye. Any voter that gives an Aye doesn’t have to be killed in the battle, so if you’re lucky enough to initially persuade these high-level folks, you don’t have to worry about fighting them.

If you're having trouble finding bombs, you can buy them from a vendor in the Item World: