Legendray...

[Sarjz]

¿Why i cant catch to zapdos, moltres, articuno, registeel, regice, regirock, kyogre, groudon, entei, suicune, raikou, latios / as, celebi, deoxys and mew?

I mean it would be nice if you could perform the same events as mewtwo and rayquaza.

 

[Perry]

Those legendary pokemons are not obtainable in-game, as you've noticed.

There hasn't been any word from the development team regarding the addition of these pokemons.