Battle Tower
The Battle Frontier where the tower is located in the third generation of games.
Series Pokémon
First game Pokémon Gold and Silver

The Battle Tower is a location found in a variety of Pokémon video games starting with Pokémon Gold and Silver that are used primarily for battling Pokémon, though some species are not allowed such as some of the more powerful Legendary Pokémon. Regardless, it is a popular place for Pokémon Trainers to go if they wish to battle a multitude of other Pokémon.