Onslaught...
Not bad. Some clever lines, but not too much that was really hard. An enjoyable read though. The Cartman line was decent, but could have been worded better. My favorite line was...

I spit like Mylanta, Spit like Tums, Spit like Pepcid Ac/
I reduce acid, in every form, for some reason Acid always wants to get inside me
lol

Acidic...
Very little wordplay. Could have been keyed in, could just have been bad. Nothing eye catching.

tey can only struggle for so long//
just like ur dog was tryin to yelp and run wen u tried to rape it wit ur tiny shlong
That made me laugh, but it wasn't really that good. I just thought it was amusing.

Vote: Onslaught for a more complex verse.

Peace