Space hoppers are rubber balls big enough for someone to sit on. Their elastic properties enable the rider to bounce into the air and propel themselves forward. The goal is to not fall off.
One space hopper was a selectable item for Flame in preparation for their fight with Vangar the Spatula Constructor. Indeed, it was the only item he took with him and made Sackhead jealous. Moments into the fight, Flame didn't seem to recognise the danger of the situation, merely enjoying bouncing around their opponent. This attitude was beaten out of him when Vangar kicked the space hopper, sending Flame flying. Fortunately, this initial propulsion caused Flame to bounce around the room, knocking out several of the other opponents. As Flame finally came to a stop, Sackhead kicked Flame into Vangar, sending his friend spinning off once more.
Flame later rode the space hopper all the way to the next level, including their meeting with the Tronic Twins. After Sackhead entered the pipe to the woodland area, Flame threw in his space hopper before entering himself. The ball smacked Sackhead on the head at the bottom, before he punched it away. However, this also caused Flame to go flying for the third time. Later still, Flame used the space hopper as a physical weapon. Upon striking Granee 8 Ball with it, she exploded and turned into carrot-shooting pigs.