R7038XX

R7038XX is a boss in EarthBound Beginnings, being a more powerful version of R7037 and R7038. It will ignore Ninten and his party and only attack Eve, and the two will destroy each other. It will appear on the peak of Mt. Itoi if Ninten and company travel that way, but it will instead block the way back to the healer's house if the party attempts to go back there with Eve.

In-game description
"New and unfortunately, improved."