shining star booster box Pokemon TCG: Sword & Shield Brilliant Stars 36 Count : Toys & Games Shield Era Pokémon TCG Japanese Shiny Star

Knowing the first two points here, it's not as much of a surprise, but

Are they legal in tournament play

However, you can only fight with the Duelist Premium, which can be obtained by purchasing the Booster Pass, Starter Pass, or Duel Pass

Scanning damaged cards allow them to live on in digital form so that you can still eke out some value from your purchases, plus you can scan foreign language cards to then have them show up in your digital library in the language you have set in the app

In the second year, Jaden meets Aster Phoenix (Edo Phoenix), a dueling prodigy, and Tyranno Hassleberry (Tyranno Kenzan), a duelist with a love for the army and dinosaurs