Zen: Intergalactic Ninja is a game made by Konami in 1992 for the Game Boy. In it, the titular character has to stop the main villain, Lord Contaminous from harming the Earth's ecological environment.
EZGames69 defeats Lord Contaminous and saves the planet in record time.
We also have a TAS of the NES version.
You can watch the complete run played back on console