Darkwing Duck (1992) is a platformer somewhat similar to Mega Man in gameplay and difficulty. The arrow gun allows the player to climb up walls and use creative shortcuts so that the absolute shortest route can be taken. In case you are wondering why the character keeps on jumping so much, it is because he has to wait a short amount of time before being able to walk. With constant jumping these stops can be avoided.
This movie is a joint venture between AnS and Randil to improve the previous run by Walker Boh, resulting in 35.7 seconds saved through means of extensive optimization, luck manipulation and lag removal. We recommend reading the authors' comments for more details.
See this run replayed on an actual Famicom console.