Creepworm

The Creepworm is an Emblem Heartless that is found in Kingdom Hearts 358/2 Days.

Strategy
They appear as small silver bugs, but will not attack the player. Their sole action is to scamper away from the player, yet they release a good amount of Heart Points if defeated. Any attack should be able to take a Creepworm out, making this Heartless even weaker than the Shadow.