Creeper

Creeper (クリーパー) is an insect Mechaniloid enemy from Mega Man X that appears in Sting Chameleon's stage and in the final Sigma Stage, when climbing up the shaft. The reason they were created for is unknown. Creepers emerge from shafts in walls or trees, and can sometimes be spawned by Mad Peckers.

In the last stage, players can use them to refill Sub Tanks for the final battle. This is done faster by using a charged Rolling Shield and sliding down where they appear.