Zoroark and Zorua (well Zorua did not freeze the game....but the others do so!)
Tornadus/Thundrus are also non shiny (even when code is enabled....but the game works properly....)
Kyurem, Virizon, Terraikon and Cobalion are however shiny with the code active.......but i don´t know if Keldeo or Landlus will also be shiny?