New category idea - kill one of each enemy.

This is what I think the run would be like:
1-1: Same as normal
1-2: Get Fire Flower, Kill a Koopa, warp to 4-1
4-1: Kill a Spiny
4-2: warp to 8-1
8-1: Kill a Buzzy Beetle (make him roll off the level)
8-2: Kill Lakitu, and a Bullet Bill (So Bullet Bill Glitch is still possible)
8-3: Kill a Hammer Bro
8-4: Kill Bowser, Goomba, Bloober, Cheep Cheep, and Piranha Plant

lol probably get fire flower in 4-1
but yea there is probably not another route of levels to do it
ofc some of those enemies can vary from one to another levels, bit it looks p good

KilleDragon, 4-1 is a better level to get fire flower because that saves some time in 1-2

You could also kill lakitu in 4-1.

I like the idea, I also think killing lakitu in 4-1 would also have the advantage of a normal 8-2 (since 4-1 you already kill a spiny)