Hey. I know we've talked about this a bit on my stream - but I was hoping that someone could document the important RNG manipulation strategies which yield the important drops.

I understand that this is easier to do in any% than in NMS?

Hey! I want to make a video about this, but the gist of what's manipulated is pretty easy:

After the first S&Q when you're going into the desert: take no damage except to get hit exactly once by the fireball spit by the first flower. You'll be guaranteed a boomerang drop in Easy/Normal Any%.

The RNG explanation at http://tasvideos.org/5102S.html is accurate - the devs have verified that the RNG was implemented faithfully from the original game.

For posterity's sake:
https://www.speedrun.com/Wonder_Boy_The_Dragons_Trap/guide/agmnq