Gigan

This is Gigan a 65 meters tall, 25,000 metric tons giant space alien monster, in the 1972 Toho movie 'Godzilla vs Gigan' he teamed up with King Ghidorah but got defeated by Godzilla and Anguirus, in the 1973 Toho movie 'Godzilla vs Megalon' He teamed up with the beetle-like god from seatopia 'Megalon' but got defeated by Godzilla and Jet Jaguar, he was in the 2004 movie 'Godzilla final wars' he was a weapon of the Xilians (Also 'NO' you're not Megalon you can be either your OC or another kaiju or IF you want be Megalon)