That New Pokemon game is Nobunagas Ambition X Pokemon for the DS
A new crossover SRPG with Pokemon and Nobunagas Ambition from Koei Tecmo
Well it’s not Pokemon Grey, but it is something else new! Revealed on the floor of this years Jump Fiesta expo is a new Pokemon game crossover with the Koei series, Nobunaga’s Ambition. If you haven’t heard of the game series before then we don’t blame you, we had to look it up as well.
The game is apparently going to be a SRPG developed by both Koei Tecmo and Nintendo for the Nintendo DS. Pokemon Company CEO Tsunekazu Ishihara has previously mentioned that they were still keen on producing more DS Pokemon titles. The good news for 3DS owners is that this probably means the next mainline Pokemon game will be on that system.
We’ll have more details on Nobunaga’s Ambition X Pokemon as soon as they become available.
Source: Dengeki’s Twitter via NeoGAF