via Nintendo
"Trace lines through the water. The plankton swim along the lines to create mysterious music.
Trapy plankton make sounds as they swim over graceful lines made up of linked triangles. The creatures follow the lines you trace along the water. There are six types of Trapy in all, each with a unique color and sound. All Trapy plankton produce different tones depending on the direction they swim. They produce the lowest-pitched sounds when they swim to the right and produce higher-pitched sounds as their path veers to the left."
via Andrew who notes: "Nintendo have just made Electroplankton available for download in the DSi Ware store. It's kind of wacky, though: They're only offering 5 of the plankton, and you have to buy each separately (for 200 points - or $2.00 each). I still have my original cartridge, but a downloadable version is appealing!"
That is a bit odd. Note you can still find the original on Ebay. Click here for a search on Electroplankton posts including video.
