One of the weirdest announcements in recent memory was a crossover title involving Pokemon and Nobunanaga's Ambition. As soon as the announcement hit, all I could think about was the awesome potential of a Dynasty Warriors crossover. Seems I wasn't alone!
Tecmo Koei had originally pitched Pokemon Warriors instead of Pokemon + Nobunaga's Ambition. Unfortunately, the idea of Nintendo's cuddly monsters wielding ancient weaponry did not sit well with the license holders, so a less violent mashup was suggested by Tsunekazu Ishihara.
That's a real shame, because I think Pokemon Warriors could quite possibly be the greatest game ever made. I'm sure it could be done without weapons too (they managed it with Ken's Rage). Come on Nintendo, this is where ALL the money is!