R7038XX (R•7038XX in Mother) is a boss encountered on Mt. Itoi in EarthBound Beginnings. It is a revised version of R7038 sent to eradicate Ninten and his friends by Giygas. A robot similar to R7038XX is shown in the Japanese commercial for the game.
Eve is required in order to survive the battle, as it will give its life to save the party. The resulting explosion will destroy both robots and reveal the seventh of the Eight Melodies.The Memory Chip (only in the GBA version) is retrieved after the battle.