The only Pokemon events that can be shiny are WISHMKR Jirachi, Ageto Celebi, SPACE C Deoxys, Ranger Manaphy (when traded as an egg,) and any other Pokemon that's programmed shiny. In Diamond, Pearl, Platinum, HeartGold, SoulSilver, Black, and White, when you try to download a Pokemon event through mystery gift, the Pokemon cannot be shiny unless it's programmed shiny. If the event Pokemon's PID comes out as shiny, then the game regenerates the PID until the Pokemon is not shiny. The same happens with Reshiram, Zekrom and Victini in Black and White. So, in fact, your PKTOPIA Electrivire is either not shiny or hacked.