To be clear, what do you mean by "been a while" and "new version"? Have you played GT in the past, or just CS1?
The basic battlesex mechanic idea of GT is the same as CS1: to start, there is a certain chance you will get zonked in combat. If you fight it, you can minimize the impact somewhat. If you don't, your vulnerability to getting zonked will increase until it's a foregone conclusion. Fights in GT are deliberately designed to flow faster, the boars were somewhat tanky, and I wanted to design something more dynamic. This also ends up meaning you need to pay closer attention though, or things can go south fast.
In order to increase the risk/unpredictability, in addition to the normal hypno moves, the hyenas can also stun occasionally. I've done what I can to limit how often this happens, in theory you should only see it pop up every once in a while. The normal hypno attempts will hit somewhat regularly though.
Something else I should point out, and pardon if you already know this, but you can't just do whatever you like in the mid-battle serving mini-game. The idea is that you have to pay attention to what the hyenas are asking for and give them that service. If you don't, you'll get wiped out pretty quickly. If you serve them properly, you should be able to survive a round of being zonked without too much trouble. I should point out that despite what I said about "fighting it" earlier, once you're zonked, this is the best way to survive. By "fight it" I more mean try to avoid being repeatedly defeated.