Special build specifically to help learn Kraid fight (but i suppose could be used for Ridley as well.. and maybe mother brain? Haven't tested that).

Used the dissassembled source code from https://github.com/ZaneDubya/MetroidMMC3 to build a version where instead of missile count, the boss health will be displayed. Note, if there is no boss on screen, it will display what appears to be random values (because its shared memory).