1. Boxes - When breaking the boxes on the box bridges, try to decide where you are by Crash's shadow on the boxes below. Try it. It will ease your pain.
2. Boss one: Papu Papu To do to beat him, dodge the large stick that he swings around. When he's done swinging, jump on his head and that sends him backwards. When he's falling back, spin him 3 times and he will be gone.
3. Boss two: Ripper Roo Detonate the dynamite boxes he lays down when he's on a nearby square. Do this three times and move on.
4. Boss three: Koala Kong Dodge the four boulders he throws at you. When the fourth one lands in front of you, spin attack the rock and it will hit Koala Kong. Do this 4 times and move on.
5. Boss four: Pinstripe Keep your eyes on him the whole time. When he jumps off the table, wait till he stops shooting then spin attack him. To avoid being shot, hide behind the couches. Hit him like that three or four times and he'll be on the ground.
6. Boss five: Dr. Nitrus Brio To beat this boss, dodge the red and green beaker bombs that he throws. Jump on the green blobs that are on the floor and those will crash into Brio. When he has thee energy bars left, he turns into a demon. Jump from the platform and smack his head. Repeat till he's on the floor.
7. Final boss: Dr. Neo Cortex To beat the doc, watch his red and blue attacks. When you see a green one, send it back. Remember, TIMING IS EVERYTHING.

Well that should be all you need.