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you cant, pokemon sienna has never existed. it is a fake version.
search pokesav on google and download version for your game
There is a fanmade Pokemon Cursed Black version on cartrige, however there is a rom you can download (i can not find the website again, I will improve the answer when i do find it, sorry)
Download a SAFE ROM then a Rom reader.
The download of PokŽmon crystal shards version for GBA can be done on the official website. An internet search will help get the PokŽmon website.