Nevermore

Nevermore is the last world of The End is Nigh. It takes place in a cavern-graveyard like place after the energy sphere in Acceptance exploded, making it a post-post-post apocalyptic world. It's filled with ogles, watcher and mother with a few crunches and turrets. It consists of 15 levels with the with the lives limited to the amount of tumors minus 450, this is limited to Nevermore and leaving will give you the 450 tumors back. The last room has a warp point that triggers a bonus ending.

The The End is Nigh cartridge can be found there.