Prior to the Scarlet and Violet expansion, Pokemon TCG cards only had four rarity symbols. These can be found in the bottom right or bottom left corner of the card, usually next to the set number.

In the Black and White Collection expansions, Ultra Rare (UR) cards in Japanese Pokemon TCG can be considered roughly ...

Pokémon TCG Pocket will now let the mobile card game’s players do the same with the introduction of the Shining Revelry set. Revealed ... has two new rainbow symbols in the rarity section ...