Hovercraft?

[LordTalps]

Trouble is TG, the three skirt design is one of the very few ways you can really move the silly box. In doing so, you also limit yourself to moving about 3 directions, which change at any given time (and with low friction, change easily). As well, you've got to protect your entire bot when it's on a tilt, as well as other bots from it. We don't need our hovercraft putting a metal bar through an electronics board, and we don't need a corner of another robot tangling with the hovercraft. The pressure needs to be maintained, which with inflating and deflating requires a lot of power. You've got many more moving parts, damage to protect yourself and others from, a lot more work from a programming perspective, as well as a hard time controlling the thing.

Too much work, trouble, and possible disqualification for the gain.