Ventus' superglide is taken from Disney World I think. After going through Pete's Rec Room ( the pin ball one ) You'll be on a platform and in raceway map. Look straight from the platform and glide all the way forward. Superglide is in a treasure chest.
Yeah, just get on top of the crates and go to the space that you see. You should see the entrance for the actual racing mini-game place and a building right next to it on the right. The space is directly adjacent to that building.