The Flea is actually a human whose armor provides the ability to shrink. On this mission, it finally becomes clear why his role is key from this page. The "target" is an alien micro robot gone haywire, and the only way to get to it fast is to access its chamber without ripping through all the hardware that is Jupiter Citadel.

Oh, and in case you didn't notice, I really didn't know what to do with designing a micromite robot... so I copied a crop circle and made it look lollipop-ish.

Fun facts about The Flea:
1) He also has a "shrinking pistol" given to him by the armor's creator.
2) His boots have a jet propulsion system for flight.
3) He might not take care of the hero work until he's gotten some Nintendo Wii time in.
4) He has a lot of experience with dismantling robots/robot-like creatures.