Hoverboards

Hoverboards are a type of technology, typically alien in origin, that are almost identical to skateboards or surf boards. When one stands on one, it hovers in the air and can move in any direction at great speeds.

X321
Tetrax's X321 hoverboard was first seen with Tetrax in Hunted, where Tetrax used to several times for transportation. Tetrax gave the hoverboard to Ben at the end of the episode.

Second Hoverboard
Tetrax used another hoverboard on Incarcecon, until it was destroyed by a Tetramand.

According to Tetrax, this hoverboard was his favorite.

Third Hoverboard
Tetrax used a third hoverboard to travel across Xenon.

Hover_Board.png
Tetrax gave Ben his X321 hoverboard at the end of Hunted.

In Tough Luck, Ben used his hoverboard to get to Hex. At the end of the episode, Gwen took it and flew away.

In Secret of The Omnitrix, Grey Matter attacked Dr. Animo with the hoverboard, but it fell into nuclear waste and was destroyed.

Second Hoverboard
In Secret of The Omnitrix, Tetrax gave Ben a replacement hoverboard for the X321 which had been destroyed earlier on.

Ben used his hoverboard in Of Predators and Prey: Part 1 to escape Khyber, until Khyber destroyed it.

Ben 10,000's Hoverboard
In Ben 10,000, Ben found one of Ben 10,000's hoverboards and rode it around until XLR8 took it away him.

Kenny Tennyson's X321 Hoverboard
In Ken 10, Kenny recieved a X321 hoverboard for his 10th birthday from his great-grandfather. Kenny flew it when he stormed off and turned into Wildvine to show off to Devlin.

Devlin Levin's Hoverboard
Devlin was flying on a hoverboard when he met Kenny and showed off on it until Kenny turned into Wildvine.

Leader Alien's Hoverboard
In The Big Tick, the Leader Alien relied on his hoverboard for transportation.

Interpreter Alien's Hoverboard
In The Big Tick, the Interpreter Alien relied on his hoverboard for transportation. It was briefly taken by Ben but he got it back.

Enforcer Alien's Hoverboard
In The Big Tick, the Enforcer Alien relied on his hoverboard for transportation.