Level 200 noblesse?

I am well aware of that, but the ability to go past a level cap is not something that is coded, it's something that is in the client, by default.

Also, no you can't do that. Very many things in the game can not be coded into the game or altered because of the client. The only thing you can do with skills is edit their stats and the image effect. You can't add or remove skills, nor can you add or remove classes.

You can modify the skills in the wz any way you want to modify how the client behaves. The client digests the WZ files, as long as you don't try to do anything that it doesn't understand you can do quite literally anything graphically and physically.

Leveling is 100% server side, not client side, so you're wrong on both counts and you've chosen a very poor person to try to argue this with.