this thread is missing boktai. it uses the sun
Indeed, and that was a fine game too; not really gimmicky or anything.
Anyway, kind of cool though probably more of an inconvenience than just using the built in wifi for trading like every other game that has it, but Bangai O spirits lets you trade custom maps/levels by way of sound. Basically, you can record the sound process that plays back when you want to upload a map to like youtube or an MP3 or something. Then if someone wants to download your map (or you download theirs) you simply hold the earpiece of your headphones to a speaker, then playback the sound and it will download to your DS. Problems being that if your headphones suck it won't work and it takes some adjusting to get the sweet spot to download flawlessly without the game constantly telling you it's too loud, turn down volume or too soft turn up volume.