Getting 5 Shinies is possible but getting FIVE SHINIES that have the QUALITIES you need for COMPETATIVE BATTLING is slim to none. So more then likely they are hackers. For example you might get a Shiny with the Right natures but will more then likely never have the IVs you need. I'm not saying I'm the GREATEST battler...but I think I'm decent...when I make my teams I put thought into them dude...I don't think anyone would like to be told that they are the weakest...but hey I guess everyone has there opinion...but like I said that guy is MORE THEN LIKELY hacking...ESPECIALLY if the Pokemon he is using that are shiny aren't "Chainable" meaning can't be caught through "Chaining" with the PokeRadar so ya...HACKER...most definately