I have a sentret that isn't brown it`s orange. does that mean you can get shiny cards
Yeah. I'll just leave this here.
Yes,you can get shiny Pokemon cards.However,I don't know how you got a shiny sentret because according to this:
http://bulbapedia.bulbagarden.net/wiki/Shining_Pokémon_(TCG) these are the only shiny Pokemon cards released:
So I think your sentret could be fake
Source: the link above
Hope I helped!