Shyni locked generations?

[mewto2015]

hi all i try to search in internet, what pokemons legendary, and all the events, canbe shyni, beacuse i try get zekrom shyni in black 2 and maybe is imposible, where i can see all the generation the shyni locks?

 

 

thanks 

[BlackShark]

Check this https://bulbapedia.bulbagarden.net/wiki/List_of_unobtainable_Shiny_Pokémon

In Gen 5 Zekrom and Reshiram are shiny locked. In Gen 6+ they can be shiny.