Grobot is a watering machine constructed by Brickle that appears in Mario & Luigi: Dream Team. When it gets hit by one of the broken fountain parts, it goes haywire and attacks its creator upon sight in the Maintenance Hut of Mushrise Park, Mario and Luigi engaging battle with it to shut it down. Its name, Grobot, is a portmanteau of "grow", which refers to its intended purpose of watering the flowers, and "robot", since it is a robot. It is the first main boss in the real world.
Grobot is a blue robot with a ball-shaped body and metallic arms normally used to pour water out of, tipped with yellow lining. It has a mouth-like hole that water comes out of, rimmed with yellow. It has red eyes, but had cyan eyes prior to going haywire, and a two-feathered top like the fountains in the park.
Grobot first appears once Mario and Luigi rescue Brickle from the park's main fountain in a cutscene showing one of the larger fountain parts landing on it while it is watering the plants in the Maintenance Hut, and causing it to go haywire. Soon after, Mario and Luigi follow Brickle to the hut to find he was quickly attacked by Grobot and hurled across the hut area. It then attacks Mario and Luigi. After the battle, Grobot is destroyed, and is not seen for the rest of the game.
Grobot mainly attacks by blowing up balls of water on its mouth and shooting them at Mario and Luigi, who must jump over the small balls of water, and either perform a timely jump onto the big ball of water or idle as it bounces over their heads. Grobot can also attack by charging head-on at one of the Bros., which can be countered by using the hammer. Grobot may also chase Mario and Luigi through the foreground, shooting balls of water at them which they must jump over before they get hit. If at least one brother is remaining, Grobot will eventually run into a rock and cause damage to itself.
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