Robo Warrior/Codes

Infinite items, walk through walls, and level select
The following code must be properly activated for all of the effects to be accessed.

Setting up the code
You will now have infinite supplies of items (except Candle and Lamp), and you can activate any of the following codes.
 * In order for this code to work, you must have the following equipment: At least one Extra energy item, at least one Megaton Bomb, and exactly 62 bombs.
 * When that is the case, push to have your ZED face south.
 * While facing south, attack a Tank (the large strong enemy that fires missiles) with your gun. You must face south the entire time and destroy it while you are standing above it.
 * When the tank is destroyed, use the Extra energy item to refill your energy meter.
 * Then press to access the inventory screen.  Put the cursor on the Extra energy item, press and hold  on second control pad, and press  on the first controller twice.

Level select
Press and hold to access the stage select screen. Press or  to cycle through the available levels, and press  to select a level.

Walk through walls
Press to pause the game. Then press and hold, and then unpause the game. Continue to press those buttons and you will be able to walk through walls.

Karaoke Mode
Only found in the Japanese version. If you somehow get a game over after clearing Period 1-1, return to game title and a "Theme Song" option will appear. Opening this will enable the karaoke mode, with the theme song used in overworld stages, along with the first half of the lyrics.

The second part of the lyrics can only be found in the game manual.