411 REFERENCE · Wikibooks
A Traveler's Guide to the World of Pokémon/Johto/Sprout Tower
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
The Sprout Tower is a tower in the Pokémon series. It is located in Violet City. In Pokémon Gold, Silver, and Crystal, the tower is a sort of a monastery that contains a lot of monks or nuns willing to battle trainers. This is also where you obtain HM05 (Flash) in those games.
Wild Pokémon
The tower is inhabited by many Rattata. At night, it is also full of Gastly which is a hard Pokémon to capture for beginners.