SuperEnergy

The SuperEnergy is an enemy in. It is a more difficult version of the EnergyRobot. Being a buffed version of the EnergyRobot, it can also heal enemies in battle. It will explode--dealing damage to everyone in the party--after being defeated. The Nuclear Reactor Robot of EarthBound and Mother 3 is likely based on this enemy.

In-game description
"There is a plenty [sic] of fuel inside."