Dragonfangs was too lazy to try it but I discovered it on my own. Its harder than the double core-x shot.
Edit: This also applies to any creature. Large creatures and bosses can be hit with 2 missles at the same time, doing the damage of both. This doesnt have much of a use besides the core-x's, though.
I think Double core-X shots is insanely difficult trick, i not find good strategy make this trick, ok my thumb are maybe too slow or this trick not working PAL versio.
Stop blaming stuff on having the PAL version :p. The double core-x shot on a normal Core-X with normal missiles isn't very hard at all, if you know what you're doing. With upgraded missiles it's a bit trickier but probably still not that big of a deal after some practice. I haven't really tried it on Beam-X's, but it seems like WD can do it.
Ok i belive you this trick is really difficult because i try many times but not working.
SORRY OFF TOPIC! I not know, how many differece PAL versio includes, but many PAL-NTCA game inculde little bit difference. Zero mission is impossible beat 9% hard in NTCA versio and scan dash not working orginal prime with PAL- versio, yeah many games includes little bit versio difference. Understand?
I don't mean to be rude or anything, but I can say with quite some confidence that there are no major differences between the European version and the American version of Fusion, apart from language options.