From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
The Nyoibou (如意棒, Nyoibō; FUNimation "Power Pole"; Literally meaning "Wishful Stick") is a magical pole that Son Goku uses.
The Nyoibou debuted in DB Chapter 1 and was last seen in Dragon Ball GT. Goku stated that the Nyoibou was given to him by his deceased grandfather, Grandpa Son Gohan. Karin mentioned in "Lost and Found" that he had given the Nyoibou to Turtle Hermit when he had climbed the tower on his request. Karin did not think anyone else would be qualified to use the Nyoibou. Turtle Hermit may have given it to Grandpa Son Gohan at some point later.
The purpose of the Nyoibou was to connect Karin Tower to the Heavenly Realm above the clouds. As seen in "Carrot Top" and "Boss Rabbit's Magic Touch", the Nyoibou was capable of extending all the way to the Moon if its user willed it. More precisely, if the distance between Planet Earth and the Moon is meant to reflect the same distance in the real world, the Nyoibou would be capable of extending outward for at least 363,300 km (225,744 mi), or roughly 28 times the diameter of Earth. It was a powerful weapon and could never break. Goku ceased using it after the King Piccolo Saga, and it is debatable as to whether or not he still even possessed it since it was clearly visible several times still extending from Karin Tower to the Heavenly Realm during the course of Dragon Ball Z. Interestingly, Goku carried it when he showed up for the 23rd Tenkaichi Tournament.
After the King Piccolo Saga, Goku's usage of it was primarily non-canonical. He used it on three occasions: to fight against Annin in the final episode of the Dragon Ball anime, to battle against Garlic Jr. and his henchmen in Dragon Ball Z: Dead Zone, and to oppose Doctor Uiro in Dragon Ball Z: The World's Strongest. He was also seen with it in the Japanese "End Credit" scene in the last episode of Dragon Ball GT.
Dragon Ball: Sleeping Princess in Devil's Castle
Dragon Ball Z: Dead Zone
It is named Nyoi-bo in Dragon Ball Z: Dead Zone.
Dragon Ball Z: The World's Strongest
It is named Nyoi-bo in Dragon Ball Z: The World's Strongest.
Dragon Ball: The Magic Begins
It is named Magic Pole in Dragon Ball: The Magic Begins. The Magic Pole was gold when it was small and would come to Monkey Boy whenever he whistled for it. It retracted when Monkey Boy spun it around.
- Grandpa Son Gohan (Was given it by Turtle Hermit.)
- Son Chichi (Used it as a weapon along with the Basho Fan and Kinto Un in Super Dragon Ball Z.)
- Son Goku (The primary user and was given it by Grandpa Son Gohan.)
- Turtle Hermit (Owned it before giving it to Grandpa Son Gohan.)
Nyoibou is collection item No. 11 in Dragon Ball: Advanced Adventure.
The Nyoibou is one of two items that Goku possesses that mimics the character Sun Wukong (in this case, Wukong's magic staff – the Ruyi Jingu Bang) in the Chinese novel Journey to the West. The other item is the Kinto Un.