try adding the mask = 1 to hide the pink. this will make the pink turn black. also to make its to be 767x447 you need to add localcoord = 767x447 on your intro, but be sure that the images sprite for your intro is in the correct resolution size
I will use my Mica Screen pack for example
My Mica Screen pack Intro is 640x480
so I add this fix and also fit in the right screen for both mugen version
[Info]
localcoord = 640,480 <---- Dev this is the resolution for my mica screen pack intro
[SceneDef]
spr = intro.sff
startscene = 0
[Scene 0]
layerall.pos = 320,240 <---- Dev this is very important key its position setting to center the image Intro screen display
clearcolor = 0,0,0
fadein.time = 30
fadein.col = 0,0,0
fadeout.time = 30
fadeout.col = 0,0,0
bgm = intro.mp3
bgm.loop = 0
bg.name = Scene00BG
end.time = 1200
[Scene00BG BACK_GROUND]
type = anim
actionno = 1
start = 0, 0
mask =1 <------- Dev this will hide the transparent color parameter on your screen