The 'Battle Zone' (Japanese: バトルゾーン,Batoru Zōn) is a sub-region on an island off the northeast of mainland Sinnoh and is home to the Battle Tower, where the player can get Battle Points, like in Hoenn's Battle Frontier. Battle Zone is based on the geography of the former Japanese now Russian island of Sakhalin (Karafuto). The Battle Zone's people do not consider the sub-region to be a part of Sinnoh.
The Battle Zone is home to three major settlements, the Fight Area, the Survival Area and the Resort Area. Sinnoh's Battle Tower (DP)/Battle Frontier (Pt) is also located in the Fight Area. In the Battle Zone, there is a facility called the Fight Area which serves as the entrance to the Battle Tower in Pokémon Diamond and Pearl. In the Survival Area, the player can rematch Sinnoh Gym Leaders in Pokémon Platinum.
Battle Park in Diamond and Pearl or Battle Frontier in Platinum is located northeast of Fight Area. Similarly to Pokémon Emerald, Battle Points are won from battles and can be exchanged for goods and move tutoring services.
Nearby the Survival Area lies the Stark Mountain an active volcano. This is where the legendary Heatran can be caught.
In the Resort Area, the player can buy unique ribbons at the Ribbon Syndicate and massages for their Pokémon.
It should be noted that, although the Battle Zone is placed on the Sinnoh region map, it is however not considered to be a part of the region. This is due to the fact that many local civilians state that Pokémon originating from Sinnoh are a rare sight and themselves do not consider it to be a part of Sinnoh. This trait is also shared with the Sevii Islands of Generation III.