Gaiares

"Command Enable"
At $304 is the text: Created Time  : $A1F3618 By ABS $FFFFE4 Bit1=1:COMMAND ENABLE The given creation time is actually stored as a 32-bit value in the ROM. The format is unknown; it is not Unix time.

Setting bit 1 of does indeed set special debug options. This bit can be set by going into the options menu (hold down A+B+C on the title screen then press Start), selecting BGM 18 then quitting the menu while holding down the A button on the second controller.

The cheat is presently known to have two effects:
 * 1) A stage select is presented upon starting a game. There are two extra unmarked options at the end of this. The first is an alternate sound effect test (B plays incremental SFX). The second shows the current value of ; A or B toggle the highest bit (its purpose is currently unknown).
 * 2) Pausing and unpausing will cycle through the possible weapons and power levels. To do this, first pause, then hold Up. While holding Up, press either A+Start (cycle through weapons), C+Start (cycle through power levels), or A+C+Start (cycle through both). You can hold the face buttons and then press Start; however, you must have Up held before pressing anything else for the codes to work.