Thrasher Grind: Underground is a skating game that appears in the episode "Johnny's Extreme Game Controller". Dukey is a master at this game while Johnny isn't. The player can customize their avatar to look like himself/herself. The game world is based on Porkbelly. This is the first game that Johnny's dad plays, and he is only able to stop when his food is burning or something similar happens.
- This game is a parody of Tony Hawk's Underground.