Alex Kidd: The Lost Stars (アレックス キッド ザ ロストスターズ / 알렉스키드 로스트스타즈)

Action Replay codes

00CD0A01

Invincibility after the first hit (time will still make the energy bar decrease)

00CD1D02

Infinite energy (not invincible, though. Keeps showing two "used" units of the energy bar. Time won't make it decrease, and you must disable the code at the end of the level, or else the bonus points will count forever)

00CD0114

Unlimited cloud shots

00CD0601

High jump (makes a really annoying sound)

See the main page for Alex Kidd: The Lost Stars (アレックス キッド ザ ロストスターズ / 알렉스키드 로스트스타즈)