I have tried to defeat Andross loads of times but I just can't do it, please..

Ok: I was stuck too, i knew what to do from the start 'cause i know that Anddross is the same in all StarFox games, ok on with it!

Andross has 5 phases, they are all the same, so really two axcept as you get closer into defeting him, it gets harder and harder.

1st Phase:
The Krozoa is a lier! Well kinda, use you lasers and shoot the Gem on it's head; and the two eyes, its pretty easy, here. Oh and aviod his only attack the line of rings, try not to get hurt here.

2nd Phase:
Now you see the pure evil and uglyness of Andross...
The same attacks over and over, hand swiping, claping. Use your lasers on the little gem in the middle of his hands. (and of course try to avoid all attacks) Keep on doing it on any hand, it doesn't matter. When you destroy a hand he will spit out mini astrieds shoot 'em. Get in the middle (in front of his mouth) and SHOOT SHOOT SHOOT as many astroieds as possible.

Don't forget that two silver rings appear (the ones that restore some health) grab 'em. After that Anddross will do what he's done in all StarFox games: Shoot mini asteroids and then suck them up, gets annoying after a while. To avoid being sucked in his mouth and chewed on and having to do phase one again press L or R repeatedly and use the boost(Y) and go in one direction: Left or Right. If you escape then you start over, except he should have only one hand and not two, do the same shoot the little gem in the middle of his hand. Repeat that until all of his hands are destroyed.

3 Phase:
It's the Krzoa again...
It's all the same except now it does rings and then missles, it'll be longer since no break time for you to get an open shot of the Gem and eyes, just do the same when the God does the rings fire at the Gem and eyes, when the missles shoot the missles or avoid them all and try to shoot them.

4th Phase:
Ugly Andross again...
It's all the same: Hand swiping, claping and now he can also do the line of rings like the God, still try to shoot the gem in his hand no matter what.He can also move around when doing the rings, and i meen MOVE AROUND. When you destroy his hand again he will suck you in, until something hits him staight in the mouth! It's Falco with a bomb! Good job Falco!

5th Phase:
Now you know that Falco's here stay in the middle of the mouth and shoot as many astreroids as possable, and when a silver ring appears get it, then Faloc will drop a box with a large S for supplies, shoot it and get the bomb. ONLY SHOOT THE BOMB (b) WHEN ANDROSS SUCKS YOU IN.

When you do it his face will go transparent shoot his bain (I know you don't wanna) and there is a little meter at the bottem of the screen, when it goes emty you win! Keep shooting the bain and dodge the thrashing until he's dead.

So hope that helps!