Cluster

Clusters are floating crystal enemies in the game Super Mario RPG: Legend of the Seven Stars. Mario encountered them in Moleville Mines as well-rounded enemies. They never fight alone and always travel with other monsters. They are strong against jump attacks and weak against nothing. They are related to another crystal enemy, Pulsars. During battle, a Cluster shatters itself into fragments, revealing a small smiling creature that is covered instantly by the crystal pieces, rebuilding Cluster's first form and attacking then. His signature move, Psyche!, allows Cluster to defeat its enemy immediately, although once this move is done, the monster self-destructs.

Trivia

 * Like Pulsars, their name may have been derived from a star cluster, which explains their movements.