With battles playing at really low fps when you enabled '60fps battles' in The Reunion's installer, I fixed that by pressing Select+Up, to increase the game's speed, but it requires you to then press Select+Down after the battle is complete and you're back in the field, or else the field plays at x2 speed.
Just a little workaround for now I suppose.
(Btw, this shit is DOPE, DLPB.)