In FFVI when Emperor Gestahl invites you to dine with him, he also asks you to persuade as many soldiers as possible that the war is over and that it's for the best. I talked to 25 soldiers. Do you get some sort of bonus item if you talk to a certain number/all?

You get a certain number of "points" for everything you do right with Gestahl. The more soldiers you talk to, the more points you get. The same goes for your dinner conversation (basically, agree with him, but don't be too extreme; i.e. say to leave Kefka in jail, but not to execute him, tell gestahl Doma was inexcusable, but don't force him to apologize again, etc.). At the end of it all, Gestahl will make certain things available to you depending on how many points you accumulated.

He will (in order of points required) free South Figaro, free Doma, unlock the stock room at the base near the Esper World, give you the Tintinabar relic, and give you the charm bangle relic.

Thanks a lot =) !