"Arguably, the first movie is the only time Plankton turns truly malevolent, and that is perhaps the first film where most reaches the summit of malignancy: He had to almost kill Mr. Krabs, enslaved all citizens of the Bikini Bottom, and hired a mercenary to kill SpongeBob and Patrick."
Sorry to but in. Chat Bots in particular are quite difficult to make as they require a lot of complex coding. You can Google some online but, again, you'd need to make them work on Wikia. Sactage hosts ours so you could ask him how he did it, although he'll probably give the answer I just gave. Hope that helps somewhat! :)