Akiba’s Trip 2 has more than Disgaea 4 Return billboards in it. Prinny (specifically Hero Prinny since he has that red scarf) is kind of in Akiba’s Trip 2 as an object you can pick up. It appears that Prinny is a weapon you can use, but if you really want to defeat the vampire-like creatures you have to expose them to sunlight. And that means pulling off their clothes.
Akiba’s Trip 2 comes out tomorrow for PlayStation 3 and PlayStation Vita.