My Idea: we all seen vegeta and nappa locating with their scouters the z fighters on the anime right after they arrived at earth so why not bring it to the game ,
How it works: imagine if i wanna someone for exemple he/she is on earth like i am and if i wanna find him/her, i could use scouter to locate him or anyone to launch either a suprise attack or simply go talk to him/her , its easy and avoids questions like : where are u