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"Let's dig! Woof!"
Puchi (プチ Puchi) is Susumu's talking dog companion and sidekick. He made his first appearance in Mr. Driller 2, as seen in the intro cutscene and credits, and then became a playable character in Mr. Driller G. He is voiced by top notch actress Mitsuko Horie, also providing voices for Anna Hottenmeyer and Susumu Hori.
Puchi was abandoned as a little puppy, and Susumu rescued him, and cared for him. Since then, he has lived in Edowaga, Tokyo with Susumu and has been Susumu's closest confidant. Puchi is either a Pembroke Welsh Corgi or Jack Russel Terrier, but no one knows what breed he is. At the end of his sentences, he says "woof" (wan in Japanese) for barking.