Mario Kart Arcade GP
The Pooka enemy from Dig Dug is featured in Mario Kart Arcade GP as one of Pac-Man and Ms. Pac-Man's exclusive items, unlocked by winning all cups in Grand Prix mode.
It's described in the official game's site as "a strong item that shoots forward or backwards".
Like all other items, it returns in Mario Kart Arcade GP 2.
While published by Nintendo, the two arcade Mario Kart games were produced by Namco, so they could freely include elements from Dig Dug in the game.