So I saw a lot of people with a great variety of shadow/cursed/luminous...you name it...and I was wondering how to obtain them myself. Could you breed shadow pokemons together and get a shadow out of it. Or breed cursed and a golden pokemon to get a luminous (just spit balling here). Aside from the breeding is there other ways (aside from auctions as well) to obtain them?

you cant breed to obtain colored, the only type you get from breeding is Normal and really small chance of getting an shiny from it.

and obtaining colored, is mostly by buying the promos when they come out, there certain event, where you can obtain a colored pokemon a.k.a the Halloween event.

No way,otherwise coloured pokes would be so common...which would make things even worse :p