Dig Dug
Although Namco has officially given the character of the original Dig Dug the name Dig Dug, in other games where he makes an appearance, the protagonist goes by the name Taizo Hori (in Japanese order, HORI Taizo), and is the father of Susumu Hori, the main character in the Mr. Driller series. Dig Dug destroys underground monsters by inflating them with an air pump till they explode.