Bigbom is a bomb-type Badnik created by Doctor Robotnik. It appears only at Metallic Madness in Sonic CD.
Description
Interestingly this Badnik isn't listed in any instruction manual, however it is referred to as "bigbom" in the game's source code. It is a giant version of Bomb from the original Sonic the Hedgehog, and the projectiles he explodes into are also giant. They are placed on paths near tight corners where you need to go to advance the level, making them impossible to avoid and escape from their projectiles difficult. Like the Bomb from the original game, the player can not destroy it. This is the only Badnik in the game that does not have a broken form due to age.