CollectionPrinny: Can I Really be the Hero? Mascot Strap Set Vol. 1
Game Title: Prinny: Can I Really be the Hero?
Released As: Commercially available straps
Manufacturer: Toy's Planning
This Prinny strap set features one PVC strap, and a set of three interchangeable metal mascot charms, so you can pick and choose which charm (or charms) you want on the strap.
Although this set is made for Prinny: CIRbtH?, it was released around the same time as the Prinny 2 game in Japan - late March 2010. These were available from the Japan Nippon Ichi online store, as well as several other Japanese online stores.
A second set of Prinny straps in the same style as these was released later on in he year. You can see that set here.