Nettler

Shemum is an enemy from the Kid Icarus series. They are slug-like creatures that trudge toward Pit and are known for their quick-reflexes.

Kid Icarus
Nettler appears only in the Underworld, where it crawls across the ground attempting to run down Pit. Even though it moves at a slow pace, it can duck under Pit's attacks making it a bit difficult to kill.

Kid Icarus: Of Myths and Monsters
In the Game Boy sequel, Kid Icarus: Of Myths and Monsters, there are monsters called Wormsers, which act just like Nettlers, but have a more worm-like appearance. Also, the stop moving when they dodge Pit's attacks.

Kid Icarus: Uprising
Octos is one of the many enemies confirmed to return in the long-awaited third installment, Kid Icarus: Uprising. They have been seen during the during the ground segments of the game, particularly in the town area.