Caterblaster

The Caterblaster (カッターブラスター) is an enemy featured in The Drillimation Series, first appearing in the 1989 platform game Mr. Driller G. The Caterblaster is a caterpillar-like insect that are the size of a small dog that freely roam around, and attack if they see the player.

Their attack sequence always starts off with them performing metamorphosis which conceals their entire body inside a pupa. The player cannot kill them while in their pupa form, and all attempts to kill them are absorbed into their body. After the pupa turns from green to white, the cocoon will explode into white bullets, which are deadly to the player, and release the caterblaster itself in its butterfly form. They will then start attacking the player by shooting projectiles from its antennae and wings. Even if the player manages to shoot off its wings, they will turn back into their regular form and repeat the process again. They are often hard to kill due to their intense attack patterns, and because of this, this enemy has received a very well reception.

Reception
Mr. Driller G was attacked by some critics, stating that they are considered to be one of the most annoying enemies in The Drillimation Series. IGN stated that they make one of the most annoying sound effects of the Driller Engine 2 Era, while trying to get from point A to point B. Due to their annoyance, an extremely popular cheat code for the PC, SNES, and Genesis versions were made to solely disable their metamorphosis sequence.