so i was owning in yugioh wc 2k8. then i had to go out so i shutdown in the middle of the duel. come back and i get 84020 error code. after about 10 minutes not touching my ds i had 1 wifi duel then got the same error code. i checked if other games have it, and they do WTF i checked the code with nintendowifi and i doubt its the router problem as i did not do anything with it and wifi was working fine before. why all my games get 84020? its nintendo that has issues right?