Godzilla
Godzilla was a well-known monster from Earth monster movies.
In 1996, an Earth media broadcast showed a creature similar to Godzilla destructively smashing through a city. While the USS Voyager was in the 20th century, Neelix and Kes watched this and many other media broadcasts. (VOY: "Future's End")
A blue holographic image resembling Godzilla was seen in Stardust City on Freecloud. (PIC: "Stardust City Rag")
In TAS: "Yesteryear", archive sounds of Godzilla's well-known roar were used for the voice of an animal native to Vulcan called the Le-matya, which dwelt in Vulcan's Forge in the region of the L-langon Mountains. (Trek Navigator: The Ultimate Guide to the Entire Trek Saga, p. 272)
The Delta Theta III aborigines bear a resemblance to Godzilla as well. Then-future Star Trek: The Animated Series animation company Filmation had been in talks with Toho Studios in the late 1960s to create an animated Godzilla series, which ultimately did not materialize. Godzilla (1978 TV series)#Production