how to know if a pokemon card is shiny

how to know if a pokemon card is shiny Help for my son please. Can anyone explain the difference between the exact same card/ from same set in shiney and non shiney (see picture). They also seem have different backgrounds Shiny Vault Charizard-GX, Mewtwo-GX, Sylveon-GX

Name: how to know if a pokemon card is shiny Help for my son please. Can anyone explain the difference between the exact same card/ from same set in shiney and non shiney (see picture). They also seem have different backgrounds Shiny Vault Charizard-GX, Mewtwo-GX, Sylveon-GX
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SKU: 64078678145
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SKU: 64078678145

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15 Tramp - Enterprising Dog Card 212/204 EN.7, Emerald Ink Lady and the Tramp doesn't have a lot of representation in Disney Lorcana , with Archazia's Island being their first appearance

And sometimes when it does that, you also gain a fresh new mana sink safely tucked away in your graveyard just waiting for the first turn you run out of action