"Black Jack's Bunny Brigade" an organization (or a gang, as some prefer to call it) is the main source of bunny related crimes in Pearson City.
Cinnamon Pepermint is one of BJBB's members, a young kid and genius chemist, with a great liking to explosions and bombs.
"Cinnamon flavour" is comics about Cinny's adventures in BJBB and Pearson City. There is no set plot and no set timeline - it's just a bit of random sketchness.
BJBB is a real group found in DeviantArt. Find more information about it here: http://bjbb.deviantart.com/