Kendo Rage

Kendo Rage
Also known as: Makeruna! Makendou Developer: Affect Publishers: Datam Polystar (JP), Seta (US) Platform: SNES Released in JP: January 22, 1993 Released in US: October 1993 This game has debugging material. This game has a hidden level select.

One of those strange Japanese action games, except this one managed to keep its Anime-style graphics.

Debug Menu

Use the Game Genie codes 1AB6-6588 + 6DB6-65E8 and select Configuration to access a fairly detailed debug menu.

Selecting "MODE 7 TEST PROGRAM" fades out, then fades right back into the debug menu, so it might have been removed. "JOY PAD INPUT TEST" and "MONITER TEST" bring up the same tests that appear in the normal Configuration menu.

Pressing the B Button will exit the menu.

PPU Version Check

Displays information on the SNES' picture processing unit.

Object Convert

This is a basic object viewer.

Controls
Up/Down: Change Style value by 1.
Left/Right: Change Style value by 16.
X Button: Increment Color value.
B Button: Decrement Color value.
L/R Buttons: Change currently loaded object tiles.
A Button: Exit.

CG Add Sub Test

Press the B Button to toggle the selected bit.

BGMODE: The SNES' current graphics mode.
MAIN: Toggles the 5 available layers (4 BG + Object layer).
SUB: Presumably toggles the sub-screen layers.
CGADSB: Related to the color addition register?

(Source: Original TCRF research)

Stage Select

On the title screen menu, press X, Y, A, B, X, Y, A, B and start the game to access a stage select. You'll go to that stage after the intro cutscene.

(Source: GameFAQs (Xeno Gigas))