Just like Kenka Bancho: Badass Rumble, Kenka Bancho 5: Way of an Honorable Man puts you in the shoes of a high school delinquent. When you’re taking a break from beating up students from other schools and part-time jobs, you can take care of an abandoned puppy.
After you find the puppy in a box you can raise it. Menu options let you feed the puppy or take it for a walk.
Maybe if you care for it enough it can be one of your battle buddies.