Double side-stage dosage.
First off, we’ve got Phazon Depths… Sadly, yes, Brinstar’s been pretty terribly infected. Kraid seems to be handling it pretty well.
Following that, a stage I made solely for personal purposes, but despite how sloppy it turned out, decided to release anyway… Bowser’s Keep: Inner Chambers. Goes in conjunction with the Princess Peach’s Castle-to-Bowser’s Keep stage hack… Yup. Have fun with that.