Back Atcha, Roy!
The mission occurs in an area with a stream. Roy moves around the battlefield, along with some Fly Guys holding Giant Bob-ombs. After a short while, Roy will signal to the Fly Guys so that he can drop the Giant Bob-omb(s) on Mario and co. himself. In order to counterattack, Mario and co. must use Trio Grab to steal a Bob-omb from a Fly Guy and hurl it at Roy. If Mario and co. successfully hits Roy three times, the mission is completed. If they get hit by Roy three times, they get an instant "Too Bad!"
In the Hard Mode variant, Mario and co. cannot take damage once, the Fly Guys fly in more erratic patterns, Roy may throw larger Giant Bob-ombs, and the Mario Bros. have 1 minute and 30 seconds to hit Roy three times.
Hard Mode Objective
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