I figured how I can introduce Plankton (from the SpongeBob SquarePants franchise) and Joe (from Help! I’m a Fish) into Cartoon Network & Non-Disney Animation Heroes Vs Villains.
For Plankton, it will go like this. Down in the undersea town of Bikini Bottom, the owner of it’s most beloved restaurant, The Krusty Krab, Mr. Krabs has heard about the war going on above and decides to play his part by giving out special Krabby Patties so he can use the money from them, and a portion of his own, to support the war effort. But across the street lies the town’s most infamous restaurant called The Chum Bucket. There, it’s owner Plankton watches in chagrin and jealousy. The puny sea creature bemoans over Krabs’s success and how he’s contributing to the war while he is left without any customers to eat here because of how sickening and horrendous his Chum products are. He is then approached by the Fishionary who gives him a business proposition that will give him the means to get back at Mr. Krabs. She gives him a pamphlet about what the Fishionary and the members of an alliance of Undersea villains have planned for all the sea. Plankton, after reading it, loves what he’s reading, proclaiming that it’s a plan so evil (and lemon-scented) that it can’t possibly fail. He announces that will join this special alliance and tells Mr. Krabs from a distance to enjoy this day while he can, for tomorrow he will steal the Krabby Patty formula and make everyone eat the Chum Bucket and take over Bikini Bottom for himself. The two head off to find this Underwater Cult of villains.
And for Joe, sometime later on in the war, a special bottle of Chemical X, which grants whatever animal who drinks it human sentience, falls into the sea and some of it is accidentally drunk by a passing black-and-white fish and shark. When realizing what just happened and noticing the special bottle, Joe decides to take it with him and he can obtain fame and power over the ocean. However, he is watched by both the Queen of The Black Puddle and Plankton who believe that he could be of use for the Darkdweller’s Alliance.