In the first film, Frank the Pug appears at a small kiosk next to an odd-looking man selling newspapers (actor Harsh Nayyar).

Frank reveals that the galaxy is on Earth and is a vast power source that has the potential to wipe out the Arquillians if their enemies, the Bugs, find it.

Humorously, Frank's true alien form still resembles a pug, albeit with a dark green color, antennae, and a 3-pointed tail; however, the series is usually not considered canon, due to the release of Men in Black II.

He at the end of the film says "Woah" after Agent K showed him and J, that Earth and the Human race are stored in a locker at an Alien Space Station modeled after Grand Central Terminal.

Frank also appears in the film's promotional music video "Black Suits Comin' (Nod Ya Head)" in which he literally pulls the plug on Will Smith's performance.

Additionally when J is being pulled over by two police officers in 1969, Frank appears on a Coney Island billboard where he is advertised as "The Incredible Speaking Pug".

Frank was excluded from the film because Mushu the dog had died, but he appears in the Men in Black III App game as Agent F and serves as the player's partner.

Frank the Pug appeared in a 2015 Men in Black-themed safety video for Air New Zealand alongside Rip Torn reprising his role of Zed.