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Mecha-Chomps are Chain Chomp-like enemies found at Woohoo Hooniversity in Mario & Luigi: Superstar Saga. They have grey, dog-like bodies and move around on wheels. They never appear on the field, instead showing up in battle alongside Laser Snifits. When attacking, the LED on its head cycles between red and green, eventually stopping on one of the two. The Mecha-Chomp then throws its head at the appropriate target: Mario if it is red, Luigi if it is green.
If a Mecha-Chomp is damaged, it starts to malfunction, meaning that the colors it displays will be for the opposite targets: red for Luigi, and green for Mario. Additionally, the item it drops changes while malfunctioning.
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