Chocobo = KOKOBO
Haha! Yes! My uncle used to drive me nuts because he would say, "coo-cuh-boo!"
This one guy I knew would also pronounce "Seifer" as "Say-faa," because he assumed the Japanese was セイファー and that they just romanized it directly from that, which was actually not an unreasonable assumption. However, when I explained to him that it was サイファー (like "cipher"), he was all like, "No way man! There's no way that's right!" (@_@; )
"Mare-ee-oh" is literally the worst, if only because I hear it SO much.