A Wiggler is an enemy in the Mario series of games. It is a yellow caterpillar that was introduced in Super Mario World, and was later introduced in the Mario Kart series in Mario Kart: Double Dash!!.
In Mario Kart
The likeness of Wiggler makes its first Mario Kart appearance in Mario Kart: Double Dash!!. Borrowing its green color from Super Mario Sunshine, long Wiggler-like buses appeared as part of the traffic in Mushroom Bridge and Mushroom City. Unlike the cars and trucks, which simply made racers spin out, Wiggler Buses flipped racers over. They are also immune to all items and attacks; if a player with a Starman hits a Wiggler, they will simply bounce back.
In Mario Kart DS, Wiggler is the final boss on Level 7 in Mission Mode. A racer must beat Wiggler in a race on Mushroom Bridge by collecting Starmen and staying at the fastest rate possible. Wiggler gets faster after each lap has passed and on the last lap Wiggler gets angry.
In Mario Kart Wii, two Wigglers appear in Maple Treeway. Bumping into them pushes racers back. A competition on Wario's Gold Mine took place with a Wiggler. Players had to race it and like Mario Kart DS, Wiggler gets angry on the last lap.
In there first appearance in Mario Kart, Mario Kart: Double Dash!!, Wigglers were green caterpillars, opposed to the recent yellow ones. They had four body sections and a head. Random red circle patterns appeared on there body. They had orange legs with eight shoes (he's gotta be fast). There was a white flower on his head, and he had a red nose and a smiley face (until you make him mad!).
The new Wigglers are now yellow, but they still retain the same features and characteristics, but just in a different color. They now have orange spots and legs with pink shoes. The flower on top of his head is still white, and his nose is now brown. Also, as a driver, Wiggler now has hands with white gloves, because it is hard to use a steering wheel without hands.
Caution: it is advised not to make these caterpillars mad; they react VIOLENTLY! They turn a dark red and have a vicious, angry face. As obstacles, when they are mad, they gain speed and power. Keep that in mind when trying to beat the Level 7 boss on Mission Mode in Mario Kart DS.