Kip. 24: Saving Kotaro!

24

Kotaro finds a bottle containing a deadly zombie virus making him sick and potentially dangerous. Go reads about an antidote made from the tooth of a walking snake. Kuro realises this is Hebibinga, and after seeing a news report about the creature heading to Hokkaido, Kuro, Mi and Dunk rush off get the tooth they need for the antidote. (Source: Wikipedia)