Dig Dug is the protagonist of the 1995 game, Dig Dug.
Dig-Dug
Character biography
Digging for the first time
Dig Dug's first adventure was in the Namco video game, Dig Dug. His main objective was to reach the very bottom of the Earth to destroy all evil Pookas and Fygars, and claim peace to the land above. He was always interested in the ground anyways, and always wondered what lived beneath it.
Returning to action
Dig Dug comes back to the screen in Dig Dug 2. His objective is very much similar, however, he only stays above ground. He promises to defend the above world from ever being invaded again by the Pookas and Fygars.
Dig Dug Arrangement
In Dig Dug Arrangement, Dig Dug faces many new enemies. He faces huger versions of the Fygars and Pookas.
Dig Dug: Digging Strike
He returns to action.
Wreck-It Ralph
He made a brief cameo appearance in Game Central Station.
Mappy The Movie
In Mappy The Movie, Dig-Dug made his new appearance as the deuteragonist of the movie.
References
Mappy Wiki Page
Taizo Hori's cameo in "Wreck-It Ralph."