Dragon Ball Z Episode 18 -

: While training in the wilderness, Gohan's tail regrows.

: He discovers the Attack Ball (space pod) that originally brought Goku to Earth. The pod projects a holographic image of the full moon to help a young Saiyan conquer their target planet. Dragon Ball Z Episode 18

In , titled "The End of Snake Way" (or "Last Stop on Serpent Road"), two major training milestones occur as the heroes prepare for the arrival of the Saiyans: Goku Reaches King Kai’s Planet : While training in the wilderness, Gohan's tail regrows

Kanzenshuu Episode Guide for deep production notes and trivia. Dragon Ball Wiki for character and technique details. Dragon Ball Z: Episode 98 – @pufferfishdude on Tumblr : While training in the wilderness