On the 6th or 7th level you will face Sabertooth and Avalanche at the same time, who are both physical resistants. A short while after beating Sabertooth he will respawn, with about half as much health, even if he falls in the lava. The EASIEST WAY to beat this level, is to have a stronger Iceman character, with a leveled up Deep Freeze move (the first move on the list, R2+X). If you have any of the Special X-treme moves (R2+triangle) this will be very usefull. ANYWAY- Select Ice man as your character and perform the (R2+triangle) move a couple of times, then continuosly use is Deep Freeze move (R2+X), this will slow the boss down tremendously. Make sure you have LOTS of energy packs, and keep doing this move, if you can, take avalanche out first.let the AI characters do most of the fighting.