King Kong vs. Godzilla (1962)
Not to be confused with the upcoming Western slugfest with an inverted name, the first time Godzilla went up against Kong saw him get a design overhaul that bulked him up and gave him more reptilian features. He lost his ears too, a design feature that wouldn’t return for over 20 years.
https://gizmodo.com/a-trip-to-godzillas-home-toho-made-us-want-to-stomp-t-1834974298
