Here is how to defeat Andross. When he is at the Korzoa part of him, dodge the beams he shoots from his mouth while shooting his eyes and the crystal thing on his head.
Then he'll turn around and try to defeat you from there. Shoot his hands until the other hand comes up. Then he'll shoot rocks and health at you. If you need to, grap the health. He'll then try to suck you up. Don't get suck up or you will have to fight him as the Krozoa part all over again.
Destroy his hands and he'll turn to the Krozoa head. This time is harder. Keep flying around his head and shoot the stuff at the same time.
This time he'll shoot missles at you. Do the same as last time. Destroy his hands and he'll try to suck you up. There is nothing you can do now. Just let him suck you up.
Just before you enter the mouth, Falco will come in and shoot him. He will say: "Different time, different planet and you still need Falco's help. Good to see you buddy.
" He will toss you bombs when Andross blows rocks and health at you (sometimes. Just before he sucks you up).
When he tries to suck you up, shoot the bombs Falco gives you into his mouth. Then, shoot his brain. Repeat until he is destroyed.
Added by: Pokemon Master , ID#353