Drain Damage

Drain Damage, is the 2nd boss level in Crash Bandicoot: The Wrath of Cortex. You face Crunch and Wa-Wa, in some kind of pumping station, located in a forest lake, during a thunderstorm. In the official strategy guide, this levels typo is "Brain" Damage. Once completed, you unlock Double Jump.

Battle
There are 3 parts of the battle, each one with Crunch using a new attack. The first phase has Crunch launching low glowing waves. These can be easily jumped over. When you reach him, spin attack him to damage him. Crunch goes to another platform, where he attacks by sending a low wave then a high wave that needs to be ducked to avoid. At the last phase of the battle, Crunch uses the low and high attack, then pounds the ground, making the platform that Crash is on sink. AFter he's hit the last time, Crunch disappears and the Double Jump ability appears.

Trivia

 * This is the only battle in the game that the boss has no health bar.
 * Crunch is larger than Crash in this battle, but in the ending video, Crunch is only slightly bigger than Crash. Why he's bigger than Crash in this battle is unknown.