BreakThru! [Model DMG-ABXE-USA]

Stage skip:
Choose "Options" from the title menu and enter CREDITS there. Now press B, A, A, B, B, A. Every single press skips to the next credits screen, and at the SPECIAL THANKS TO (6th screen) you'll hear a sound. Now, start a new game. Any time, hold Start and press B/A to skip to the next/previous level accordingly. This also pauses the game, so you must unpause it before continue. On the emulator you can hold auto-fire B/A buttons and then shortly press Start to avoid unnecessary pausing.