Super Boy II is a pirated copy of Super Mario Bros, originally pirated to the SG-1000, the pirated game also made it's way to the Korean SMS as a direct port.
- Emulator used: Bizhawk 2.3.1
- Korean Bios (SHA-1: 2FEAFD8F1C40FDF1BD5668F8C5C02E5560945B17)
the previous submission from nitrogenesis misses alot of time saves that may be hard to spot. in this game the screen updates every 4 frames, so it's important to spot any place where it doesnt take 5 frames to update. places where it will take 5 frames to update is if you collect too many coins at once, hit a block from below, or run on a falling platform. there's also weird properties with Mario's speed which I dont exactly know myself, however after some experiments I believe I got some pretty optimal speed changes.
: Updating with 23 frame improvement by me, claiming coauthorship and unclaiming.