Star Fox Cheats

Choose Course 1 and try to get to the Asteroid Belt, and then go through the course as you normally would, but when a long chain of Asteroids appears, wait until they're very close to you and then destroy them. An asteroid with a face should then appear, so shoot it until it becomes a black hole, and then go through it.

All you have to do is simply follow Slippy through all the loops of the first level on any route.
It's that easy.