Pokémon Conquest, also known as Pokémon + Nobunaga’s Ambition, is a spin-off crossover game that combines the worlds of Pokémon and Nobunaga’s Ambition (a series of strategy role-playing games set in feudal Japan) into a turn-based strategy RPG.

Conquest takes place in a brand new region called Ransei, where nearly 200 Pokémon from all five generations live. In the game, the warlords of the 17 kingdoms all have Pokémon companions. These companions are interchangeable, but there is one particular Pokémon that works best with each character. Warlords can link with a Pokémon to bring out its full potential, and some Pokémon evolve when their link percentage gets high enough. When a warlord’s link level is at a high enough percentage with their most compatible Pokémon, they also have an opportunity to evolve. Link percentages are raised mostly through battles—the more battles a warlord takes place in with his partner Pokémon, the higher the link percentage becomes and the more powerful the duo becomes.

Players can bring up to six characters into battle with them, as well as one Pokémon per character. Players take turns battling it out on a range of different fields, with an isometric view of the battleground. Battle outcomes are determined by which side achieves the victory conditions for the match. A battle might be won when all the opposing side’s Pokémon are knocked out, or by capturing the other side’s flags. During the battles, players can defeat and befriend other warlords, warriors, and Pokémon. After winning battles, players take control of new castles, allowing them to recruit the respective kingdom's warriors and granting them access to new Pokémon.

The game is rumored to last about 20 hours, but there is an additional “Final Scenario Mode” in which players can unlock extra chapters, which can increase the playtime of the game exponentially.

There is also a wireless multiplayer mode in the game, which allows two players to battle each other.

Pokémon Conquest was released on March 17, 2012 in Japan and will be released on June 18, 2012 in North America.