The Lion King is about a lion who becomes king. It takes about 17 minutes and is mostly paperwork, but it does involve some prancing around the Pride Lands.
Mukki manages to complete the game (and, subsequently, expedite the process of becoming king) over 30 seconds faster than the previous movie. The author does this using tricks such as catching ledges and glitching past leopards.
We have a TAS of the SNES port here.