I beat the game,and in MHX:
*Arm parts in Sting Chameleon's stage
*Foot Parts in Flame Mammoth's Stage
*Head Parts in Chill Penguin's Stage(Not in the same place as the foot parts in the SNES version)
*Body Parts in Storm Eagle's stage
Getting the Hadoken is basically doing a damageless run of Armored Armadillo(Fully Charge Rolling Shield and then Go ballistic with Storm tornado)
and the Hadoken is buffed so it can kill Wolf sigma.