first lets talk about Godzilla Godzilla is a giant lizard that has atomic breath that can attack his foes now unto Omega Flowey flowey is a flower that is souless and cannot love others he can get the human souls and turn into Omega Flowey but when he got 7 souls he turns into Asriel Dreemurr he can throw nukes and shoot petals and even shoot guns at his foes now in my opion i think either godzilla or omega flowey will win.