As odd as it is to see Nobunaga and other historical figures paired up with cute little Pokemon for overhead strategy in Pokemon + Nobunaga's Ambition, just imagine if they'd been paired up in a high speed action slasher ala Dynasty Warriors. We may have gotten Pokemon meets Dynasty Warriors had Tecmo Koei's original collaboration idea gone through.
In Weekly Famitsu this week, Pokemon chief Tsunekazu Ishihara and Tecmo Koei chief Yoichi Erikawa revealed that the collaboration originally began with the idea of pairing Pokemon with Tecmo Koei's more well known Shin Sangoku Musou (aka Dynasty Warriors) franchise. Tecmo Koei approached Pokemon with the collaboration idea. Ishihara recalled thinking that a pairing with Nobunaga would be nice.
The name "Pokemon Warriors" or "Pokemon Musou" may make you picture Pikachu on a horse slashing away at thousands of enemy troops. It's likely that a paring of Pokemon and Dynasty Warriors would not have been like this, though, as Ishihara noted that although Pokemon + Nobunaga's Ambition is a Sengoku game, they're making it so that the characters do not hold weapons. (A quick search our image archive does reveal lots of cute critters, but no weapons).
While Pokemon + Nobunaga's Ambition is a collaboration between the two companies, Ishihara said that Tecmo Koei is in charge of development.