Battletoads for the GameBoy is a platformer following on from the NES version and containing levels with a wide variety of gameplay.
Here is an improvement to Battletoads that I worked on while improving GBHawk. The original run was poorly emulated at the cutscenes.
The primary improvement is in the boulder level where a out of bounds glitch is used to skip most of the level. This is already known and used RTA, so the old run was also quite outdated.
I also improved some of the latter levels by a few frames, notably the rappelling level. Some of the bosses though are 1-2 frames slower due to differing RNG but levels are still faster overall.