Source: http://www.nintendoworldreport.com/news/28717

And the Jump Festa announcement we've all been waiting for is...

A Pokémon game crossed over with Nobunaga's Ambition, an RPG where the player attempts to conquer ancient Japan!

Yup, quite possibly one of the oddest crossovers out there, but hey, if you've always wanted to use your Pokémon to actually conquer Kanto rather than win its badges, this game sounds like it's for you!