Quick to anger with a head full of rocks, Rok-Ko is the elemental mask of Earth. He controls such earthly forces as earthquakes and landslides to name a few.
— The Wrath of Cortex instruction manual
Rok-Ko is the Elemental of Earth, quick to anger with a head made of rocks. He has the personality of a typical school bully, and his immature insults to Crash reflect this. He controls earthly forces such as earthquakes and landslides. The only witnessed powers he possesses are causing rocks to fall from the sky and protecting Crunch with a rock sphere. He also might have a bit of control of fire as rocks turn on fire when Crunch touches rocks. It was stated by Cortex that the other Elementals are significantly more powerful, making Rok-Ko the weakest mask. He is voiced by Thomas F. Wilson in the English version and voiced by Toshiaki Kuwahara in the Japanese version.
"What are you looking at, fuzzhead!? I'm Rok-Ko the Earth Elemental. Uka Uka and Dr. Cortex woke me from my captive slumber, and now, I'm free to pulverize whatever gets in my way. Oh-hoh, don't even think about getting those Crystals, runt. 'Cause if you do, I'm gonna bury you alive."
"You want a piece o' me, bandicoot? Huh? Huh? Do ya? Hah! Wuss."
"Oh, I am gonna shake, rattle, and roll your bandicoot butt!"
"Well, well, looks like the bandicoot's been busy collecting Crystals! I warned you, bandicoot."