Instructions
Select at least two players at the "Sonic Robo Blast 2." Make sure each player chooses to play as Tails.
Pick up the other player with the "C" button and start flying by pressing "B."
Throw the Tails that hasn't been flying in the air with the "A" button and that Tail's player can press "B" to make him fly. Catch the falling tails with the "C" button and carry him until the currently flying Tails starts to fall.
Juggle back and forth between the flying and being carried throughout the whole level to keep Tails flying.