Goku's Doll (悟空の敵は...悟空!? Goku no Teki wa...Goku!?) is the eighth episode of the Piccolo Jr. Saga and the one hundred thirtieth episode in the Dragon Ball series. The episode first aired on October 19, 1988.
On Kami's Lookout, Goku's sparring partner turns out to be a clay version of Goku, except that his eyes are the same as Mr. Popo's. Their skills are exactly the same, the only difference is that the clay Goku has no interference in his mind, and can concentrate completely on fighting. Goku has an extremely difficult time concentrating his mind. Finally, he seems to understand how the doll is disturbing the energy around him and defeats the doll. Well, he thinks he defeats the doll. Truthfully, the doll's energy simply runs out. Goku falls asleep, exhausted. Meanwhile, the boys continue toward Korin Tower.
- The symbol on the doll's Gi is the kanji 神 (kami), which means "god".
- In the Blue Water dub this episode is titled Goku vs. Goku!.