Fighting Vipers 2

When you defeat B.M., you normally see finished character art during the credits; however, if you defeat B.M. with a Super K.O., you'll see some original design and character concept art instead

Most websites say that all you have to do is win 6 matches with a Super K.O. and that is well...wrong. The actual way to get Honey's Nurse Outfits (ie her alternate costumes) is by having seen all 6 Super K.O.'s. There are different animations for the Super K.O.'s depending on the stage you do it in. You have to see all 6 different ones as well as beat the game in order to unlock Honey's new costumes.
The Super K.O.'s and where you can find them are listed below.
Super K.O. #1
Name: City Explosion
Where Found: Cross River Damsite/Old Armstone
Super K.O. #2
Name: Meteor
Where Found: Dark Royal Hanger & Deck, Neo Armstone City Tower, and Skies of Armstone
Super K.O. #3
Name: Tornado
Where Found: Serpent's Cage
Super K.O. #4
Name: Dinosaur
Where Found: Terror Furnace and Great Museum
Super K.O. #5
Name: Missile Command
Where Found: Marble Arena & Secret Chemical Plant
Super K.O. #6
Name: Lightning Strike
Where Found: The Great B.M.