You need to have "invincibility" unlocked to defeat bosses very easyily. To defeat bosses very easy is to catch them on fire somehow once there on fire run straght up to the boss so that you catch on fire and keep on running where ever the bosses go so that you and the boss stay on fire (you can only do this if you have the cheat "invincibility" unlocked). Finally once the boss is on fire long enoungh he will die. This is very easy to do if you have invincibility.
Hope this helps!!!
Added by: Jackets28 May 10th 2008, ID#30086