Sky Yddet

The Sky Yddet is an enemy in EarthBound Beginnings, found in. It is a tougher version of the Raeb Yddet, and can only be summoned by it in battles where the Raeb Yddet is aligned to the side of the screen. It can attack, waste turns grinning and bearing it, or use a last blow attack. The last blow attack is what makes it a dangerous encounter: the attack defeats itself and does about 200 HP of damage to one party member. The first time they can be encountered is when Ninten is alone and has far less than 200 HP. Defeat it quickly, or run.

In-game description
"It has friends!"