Did Du fight and/or defeat Omega Weapon?

I haven't fought him yet, but I know how to fight him and what to do in order to beat him. However, I'm sure it will be much different once I actually fight him. I wanted to fight him but I could never figure out how to do the glocke in the Chapel and get there in time to fight him.

why would Du do that to my bby T-T

^ Because... it's necessary... XD