: Upon landing on the tiny, high-gravity planet, Goku famously mistakes Bubbles the monkey for the legendary King Kai.
You can find this episode and detailed guides on official and community sites like: Dragon Ball Z Episode 18
: Goku discovers that King Kai's planet has gravity 10 times stronger than Earth's, making it difficult for him even to stand initially. Gohan’s Second Transformation : Upon landing on the tiny, high-gravity planet,
: After 100 days of traveling the million-kilometer Snake Way, Goku finally reaches the end. : Gohan transforms into a Great Ape (Ōzaru)
: Gohan transforms into a Great Ape (Ōzaru) for the second time. To stop the rampage, Piccolo destroys the spacecraft, which ends the holographic moon and causes Gohan to return to normal. Where to Watch
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