Go-karts are what a Guild that is out of default and has both of the second floor's wing would want.
Devilite Kart - An office-themed go-kart that has a Devilite in the back of your kart. He throws office supplies to bump other go-karts away, if you want him to.
Clockworks Kart (Construct) - A go-kart that looks like it holds Cradle together. A Rocket Puppy decorates the back of the go-kart, veering other karts off course.
Clockworks Kart (Gremlin) - The version of Clockworks Kart with a Gremlin Mortafire in the back seat. He serves as Rocket Puppy.
Chroma Kart - A go-kart that looks like your on a giant chameleon. In the back, a Gremlin Thwacker twirls a double-headed Thwack Hammer around to hit other Go-karts.
Snarbolax Kart - A go-kart that throws Frumious Fangs around.
Royal Jelly Kart - A go-kart that loves to throw it's weight around. In the back, a Polyp disorients other karts driving around by hitting them, either as a fist-shaped appendage or as a regular Polyp.
Ironclaw Munitions Kart - An upgraded Clockworks Kart (Construct).
Kart Of Almire - A relic from a golden age. It uses Wheel Launchers and a ballista seat to make driving around a whole lot more fun.
Lichenous Go-Kart - A tackling kart that looks like you are controlling a Triple Lichen's protoplasm.
Guild Fun
Where is the lazer beaming tank? ^^
As much as this would be really cool... I don't think it would fit into spiral knights... :P
Or at least the devs have more pressing conserns, like depleated raidiant firecrystal mines, armour rebalance and apparantly making casinoes usefull... o.O
Proto Kart (Knight) - A go-kart that is themed after, I don't know, the start of every Knight? In the back, a proto gear you makes driving fun.
Proto Kart (Energy) - An energy turret replaces the NPC Knight. Laser beaming tank granted.
Proto Kart (Together) - Proto Kart (Knight), but without the knight. Both players have access to gear. Driver: Dual Proto Guns, Proto Bomb Placer. Passenger: Weapons.
Arcade Machine (Drakon Skyfight 1) - You play as a Drakon trying to survive Greavers, Silkwings, Ironwood Sentinels, and Gremlin Mortafires, among other monsters trying to kill you. Bosses like the Ironwood Sentinel are at the end of every stage. (1P)
Arcade Machine (Cradle Fight Club) - You fight endless waves of monsters in an arena, with phase bosses. (1P)
Arcade Machine (Spiral Knights The Fighters) - Another fighting game, with a Story Mode (1P) and a Krogmo Mode (2P).
EDIT: Proto Kart (Energy) and Proto Kart (Knight) are easiest to implement.
are you drunk