The Hover Bike is a floating motorbike with a magenta coat with chrome thrusters and interior. The player purchases the vehicle which from Gil in Level 7 for 1000 coins, making it the most expensive vehicle in the game.
The Hover Bike only appears once the player purchases it from Gil in Level 7. Due to the extremely high price and the amount of time it takes to get the opportunity to unlock it, the Hover Bike is usually the last vehicle the player will unlock, especially if they complete every level entirely as they play.
Even though Professor Frink created this vehicle in the show, he doesn't ride the bike in the game.