I actually did once think of a fourth season for Captain N. It would explain plotholes like how Kevin's mother never noticed him and Duke were missing (copies of them were put in their places a la The Last Starfighter) and Kevin's gamepad belt and Zapper would've been upgraded into a Super...
I'm livid at how they can't even get names of the viruses right.
Red is Fever, Blue is Chill, Yellow is Weird, WRITE THAT DOWN, NINTENDO.
EDIT: Ah shit, looks like I lied to myself. They were only called by those names in the comic adaptation and I thought those were official. Curse you, Valiant!