Mother Brain dies right after you pop her tank and drop her drank. She turns to dust right after dropping down. No more baby cutscene and no humanoid fight.

The brain looks a little weird when it drops down (for 1 second) due to a GFX bug. I'm simultaneously releasing a GFX patch that you can put in your "Enemies" folder XML\Export\Enemies

The GFX patch will replace the brain GFX to fix the way it looks after it falls down. Using the GFX patch now makes the falling/crumbling pipes look a little weird so you can pick whether you want to have the brain look weird for a full second (no GFX patch) or the falling pipes look weird for a couple seconds (yes GFX patch). Personally, I'm using the GFX patch.

Experimental. Use at your own risk. I know I'm going to use it in my romhacks.