More accurately, making a 1961-sized-Mothra prop in scale with a Godzilla suit would have resulted in an enormous and completely unwieldy marionette.edgaguirus wrote: ↑Thu Dec 02, 2021 1:54 pm I guess they didn't want Mothra becoming a bigger star than Godzilla.
The imago in the 1961 movie is only portrayed as big as it is because the miniatures could be scaled to the size of whatever the prop needed to be. You can’t do this with a Godzilla suit - it’s size is fixed because of the actor inside of it, so you’re left with the choice of either increasing Godzilla’s size or downsizing Mothra if you want the pair to share the screen together.