I mean RWBY Chibi didn't completely replace the original show to be fair.

I may not be much of a TTG fan but I'd still say "TTG didn't really replace the original show you know." For one TTG started airing many years after the original show ended, and it's not like it erased the original series from existence (Cartoon Network really does in fact still rerun the original show as of late too).

Pan Pizza has been known to make that argument a lot and frankly whether you love or hate TTG technically he's right. it didn't "replace" a preexisting show, it's just a dumb parody cartoon that got popular with CN's target demo of little kids. You can dislike TTG all you want (my feelings on the show have gone from "it's an okay parody" to "I wish CN would AT LEAST stop relying on reuns of this show so damn much"), but saying it "replaced" the old 2003 cartoon is factually incorrect.