It's probably nothing big, but I encountered a glitch when casually playing this game (on the PAL version):

Whenever you win a fight, you see a winning animation by Brian. If you are quickly enough you can use a spell during that animation ( there is a small frame window where you can start using a spell at the beginning of the animation). For example you can use a heal spell and interrupt the animation which can cause the music to not play for some reason. I haven't really looked deep into that, but maybe you can also pause, use an item or a different spell instead and cause something weird. Feel free to mess with this.

It's not something big, but I just wanted to have told the community about it as it may turn out to be useful with more research.

Both of these glitches are known. The first glitch mentioned is not useful in any way that we are presently aware. The second glitch is something known as the "initiative glitch", because it allows Brian to "cheat" the first turn in the battle. This has potential uses, but because it is, to our knowledge, frame-precise (or at least no more than 2-3 frames), it's pretty much impossible to trigger on command - just a sort of nice accident if you get it.

First glitch is slightly useful, you gain control of Brian faster, if you were able to use it consistently throughout the run it would certainly save some time. Also the most recent glitch that Squid found with the zelse mega clone uses this