It has the same shape of Grobot but with different colors. Round, red body with round, blue, grumpy eyes. Two grey arms and four legs with wheels.
Water Bubble Spit - Grobot X will hurl bubbles of water at Mario and Luigi with its mouth, this should be dodged by jumping. It has either attacks of big bubbles or small bubbles; big balls are not meant to be jumped and small balls must be jumped over.
Robot Ram - When ramming it moves back and go forward while not looking at Mario and Luigi and spit out water to speed up. This should be dodged by hit it with a hammer.
Robot Chase - Grobot X will chase Mario and Luigi by throwing small water balls, when its left arm aims at Luigi, he should jump. When its right arm aims ay Mario, he should jump. When the two arms aim at all Mario Bros., rhey should both jump. When continuing avoiding his attacks without damage, Grobot will crash to a rock at the end.
| Mario & Luigi: Dream Team enemy|
- This is the only X boss in the game that requires defeating it to progress through the game.