latios latias pokemon card GX although the best care is taken to make sure everything is correct I know nothing about the

Yes, you can counter a triggered ability with specific cards that say counter target triggered ability. Regular counterspells like Counterspell only work on spells, not abilities already on the stack

First Edition cards have a small "Edition 1" oval stamp printed on the card

I like to use the cardboard sliver boxes for TCG storage, but dont seem to be able to buy the single card width boxes any more These templates allow you to cut out and fold the correct shape from cardboard eg an amazon box

Like most Pokmon cards, the value of Sharpedo depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Secret Wonders)

See here for a full deck guide on Edgar Markov

How can I determine what the card says