Magic Dart's 

Character moves

Robot

Center your shot horizontally and vertically, then release 
the dart at half power. About one third of the time, he 
will make a super accurate shot.

Monkey

Hold B while he throws. On his next shot he'll throw the 
dart behind his back.

Macho Man

Throw with maximum power, and about one third of 
the time he will throw a board shaking shot.

Alien

After he throws, hold A and B to make the dart stop in 
mid-air. While holding the buttons, use the Control Pad to 
redirect the dart. This works about one third of the time, and 
most often on the third dart. 

Use the Alien's Trick Shot to hit the fly on the dartboard. 
This will transform the face of the alien to an even weirder face.