Wave Scanner

Wave Scanner (ウェーブスキャナー) is a device released by Takara Tomy in Japan that can be connected to the Game Boy Advance port of a Nintendo DS for use with Mega Man Star Force and the Wave Transer toy. It is basically the successor of the Battle Chip Gate, allowing players to use Battle Cards. It also functions as an AM radio.

Anime
In the Mega Man Star Force anime, Geo Stelar and Patrick Sprigs use a Wave Scanner.