Halo CE - Voltorb Pokemon replace grunts pillar of autumn playthrough

I was going to replace all the covenant with voltorb but for some reason when I replace the grunts and elites with voltorb's biped, they become friendly. anyway, the cool thing about this is the voltorb actually speak too.
I got a screen recorder that focuses only on the game so you don't have to see my desktop and doesn't lag.
Credits: SeanTheLawn (creator of the biped)