Robot
Center the shot horizontally and vertically, then throw at half power to extend the robot's arm.

Monkey
Hold B during a throw to throw the next dart over the monkey's shoulder.

Macho Man
Toss the board with maximum power to hit with full force one out of three times.

Alien
Press A + B while the dart is in flight during the third throw to freeze it. Use the D-pad to move the dart, then release all buttons. To transform the alien head, hit the fly on the dart board.