Grabba is a large mummified hand that holds a Jiggy in Gobi's Valley. Once you encounter him, he will pop out of the ground, revealing the Jiggy. If you try to grab it then, he will immediately go back underground. The only way you can retrieve the Jiggy is if you grab the Running Shoes and grab it from Grabba. Once you have the Jiggy, Grabba will go underground and cannot be seen for the rest of the game.