When two people form a BrotherBand, they can contact each other at any time. They also learn their friend's secrets, so BrotherBands are only formed between people that really trust each other. BrotherBands can also be formed between planets, such as how Kelvin Stelar attempted to form one between Earth and Planet FM using his satellite. As revealed in Mega Man Star Force 2, the BrotherBand was created by Lan Hikari as an adult in an attempt to unite people the same way he and MegaMan.EXE were connected.