Electroplankton Nanocarp is a DSiWare video game released in 2009. It costs 200 Nintendo Points. Electroplankton Nanocarp is the same game as the Nanocarp mode in Electroplankton for the Nintendo DS. Virtually nothing has been changed, despite the omission of the nine other game modes (which were released separately on DSiWare).
NintendoLife, who gave the game a 5/10, stated that Nanocarp on its own isn't very appealing despite being one of the more creative Electroplankton titles. They mentioned that if you liked the other games in the series, then they would definitely recommend Electroplankton Nanocarp.