In the climax of which 1984 supernatural comedy do the protagonists battle a giant, kaiju-sized corporate mascot known as the Stay Puft Marshmallow Man?

Ghostbusters

The Stay Puft Marshmallow Man was chosen as the physical form of the deity Gozer because it was a seemingly harmless childhood icon. The film was a massive box-office success and spawned a multi-media franchise including cartoons and sequels.