Not a finished run, been a while so I don't remember frame counts, but better navigation around ledges above you.
Saves 5 frames on the first mothership kill but isn't able to maintain this timesave to the next loop.
Falling to avoid this guard is completely unnecessary just not hold right for so long you end up in his vision.
cleaned up version of #7327: fanTAStic's GBA Gameboy Advance - 3 Game Pack! - Candy Land + Chutes and Ladders + Original Memory Game "Memory Game" in 00:39.31 by 10 frames
20 frames saved at about frame 19000, probably also applies to other segments, also probably not extremely optimized.