Legally it's Godzilla. Zilla is the Toho version that appeared in Final Wars. This is the 1998 one, trademarked as Godzilla, and as such is called Godzilla, not zilla.
@kaijuwaiju3954 Byt he isn't tho 😂😂 Toho (literal creators of Godzilla, btw) and everyone else, already established that 98 isn't Godzilla. Womp womp deal with it