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Father of Son Goku. Introduced in Dragon Ball Z through the A Lonesome, Final Battle - The Father of Z Warrior Son Goku, who Challenged Freeza TV special, before being reintroduced through the Dragon_Ball_Minus:_The_Departure_of_the_Fated_Child special bonus story included in the collected volume of Ginga Patrol Jaco, which was later adapted as part of the first half of Dragon_Ball_Super:_Broly.
See Also
* Masked Saiyan