In Megaman battle network 6 were is the eraseman link

After you're done getting the moon stone and finishing the contest in Central Town, you'll be invited to take classes from 2 guys. One of the guys is in Seaside town and the other one is in the school (the room next to Mr. Match's room). After you're done with the classes, you'll have to battle Eraseman.EXE. Finally, you get Erase cross link. It's pretty cool.