If I had a penny for everytime somebody asked about Zhokar's route, I would be a billionaire by now. 

Either way, Zhokar's route isn't out yet. It will come out in a later update, probably soon too if I remember right. 

Choose "Punch to his gut" three times, although the first time he will dodge, he will not dodge the next two attacks, therefore you can win 2-0

Trying to figure that out to, Ill let you know. if others can figure that out that would be helpful too.

If I'm to put a guess to it, as I've just played through the Zhokar route, the missing CG is a "realization" scene. You have to go back to Aris, Day 7, and make three choices: 1) go out of your room in the nude (which will happen automatically if you're at least Barbaric 1), 2) use the restroom instead of going back to your room, and 3) suck the cock that appears through the gloryhole. It's on the Zhokar route that you realize who that cock belonged to.

where to get that scene anyway? Spiceport or aris??

Not sure if you already figured it out or not, but here's the guide; every locked CG in the gallery that has  icon while you are pointing it was only be able to unlock by playing "no romance" route.

To do this, you must not accept any dateable characters as a boyfriend (now Macsen and Zhokhar)

You can using [Trailmakers] to find those CG if you don't have enough time or didn't save the choice part.

OH I GOT IT; so it was the "no romance" route.