Chain Chomp

The Chain Chomp is an item introduced in Mario Kart: Double Dash!! as Baby Mario and Baby Luigi's Special Item. It acts similar to the newer Bullet Bill from Mario Kart DS onward, except the user can get disconnected from it by hitting any items. It may also throw the user off the track.

Koopa Kart: Double Trouble!! (2004)
The Chain Chomp is an item in Koopa Kart: Double Trouble!!, where it can be obtained from 5th to 10th place. It is Monty Mole and Popple's Special Item. It has the same function as in Mario Kart: Double Dash!!, except it's easier to control, as the player can move the Control Stick to align themselves.