Yeah basically(its like the DS local wifi), cept it sucks, no one uses it, and it is NOT compatible with all games like many people think. The only games are pokemon fire red, pokemon leaf green, pokemon emerald, the classic nes series, and digimon racing i think, unless there are more.
Like i said it would work if everyone were to bring their copy of pokemon fire red/leaf green/emerald to a mall food court and play but unless you can somehow miraculously make that happen i dont think your ever gonna get any use out of this device.
If you want to play pokemon online (with other people) your best off saving your money for pokemon diamond/pearl when they come out, ignore the gba/gbc games for now. If you have pokemon gba games hang onto them though, since you will probably be able to download your pokemon to the newer DS games.