Thanks for that victorards for that guide...

Simple route, just go in level order and you'll be fine then fight each boss.

Boss Rundown:

Dingodile - Get behind Dingodile, if you're in front of him he will pause and shoot. If you have 2 Aku masks abuse them making the fight faster. Always have a mask to abuse for the last hit.

N.Gin - 13 Top | 12 both sides | 8 Bottom

Tiny Tiger - Avoid All 5 Jumps (not including rest)

Neo Cortex - Do the Green one last.

9th October 2015 - Dingo info, corrected.