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A Huge Mysterious Tree!! (Japanese: ぶったおせ! 謎の大木!! Solid Strike! Large Tree of Puzzles!!) is the tenth chapter of the Pokémon Gold & Silver: The Golden Boys manga.

Plot
🇬🇼 wants to battle Whitney so that he can get his back, but Whitney is still unable to battle, as she has to head to the Pokémon Summit, a meeting of all the Gym Leaders from Johto and Kanto in Ecruteak City. She asks Gold to tag along and he agrees. On their way out, the Day-Care Lady gives Whitney and Gold a Pokémon Egg to pass to Professor Elm.

On their way out of town, a boy from Goldenrod Gym stops them, explaining that the Pokémon Summit may be cancelled due to a giant tree blocking. Whitney explains to Gold that a few weeks ago, a small tree appeared on the route, but nobody cut it down because there was a drought and everyone expected the small tree to die. Yet, somehow, the tree grew larger and larger until it began blocking anyone from passing. Whitney and Gold decide to take down the tree and head for the route.

Around the giant tree, there is a large crowd of campers and spectators, including several street vendors. Whitney's picks up a SquirtBottle and tries to water the giant tree, but Whitney stops her, saying that water will only make the tree grow bigger. Whitney and Gold send out and  to  the tree down, but it seems unaffected. Whitney sends out, thinking that its  will burn up the tree, but it remains unaffected.

The tree starts walking, and the group realize that it is not a tree at all, but a giant. They think that it may be a, but Fire- and attacks have no effect on it. However, when Cleffa pours the SquirtBottle on Sudowoodo's foot, it damages it, making Gold realize that it is in fact a. He has, and  weaken it, then combines Totodile's  with 's , creating a rain-like effect, which causes Sudowoodo to shrink. Gold quickly captures it, and his Totodile and Pidgey evolve into and  after gaining experience from the battle.

Major events

 * 🇬🇼 captures a, unblocking the path to.
 * Gold's evolves into.
 * Gold's evolves into.

Pokémon debuts

 * (Gold's)
 * (Whitney's)

Humans

 * Whitney
 * Day-Care Couple
 * Day-Care Couple

Pokémon

 * (Whitney's)
 * (Whitney's)
 * (Whitney's)
 * (Whitney's)
 * (Whitney's)
 * (Whitney's)
 * (Whitney's)

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