Viperia is a kingdom in Ransei in Pokémon Conquest that is led by Nene. It is home to many Poison-type Pokémon.
When the player first arrives at Viperia, it is under Nobunaga's control. Nene tells the player off for trying to defeat Nobunaga, then reintroduces the player to the former Warlord of Ignis, who has undergone a Warriors Transformation, as well as evolving his Chimchar into Monferno. The battle begins, and the player must be the first to capture three banners, while also avoiding poisonous puddles and trapdoors. After defeating Nene, she says that you might have a chance of defeating Nobunaga, then leaves.