Blue Kappa Shell
Locations:
Price: N/A (Dropped by Kappa Ninja (1))
Sellback: 500 Gold
Rarity: Weird Rarity
Description: A great blue shell plunderd from a fallen Kappa. Has a high defense rating against backstabbers.
Note: Also see Orange Kappa Shell.

Thanks to Hockeyman790, Tendou no Mazo, Weena and Zyrain.