Mega Mewtwo X and Mega Mewtwo Y are two different mega evolutions of Mewtwo. They are powerful Pokémon with different abilities and appearances, and are highly sought after by collectors.
Here's why you might be confused:
* Mega Mewtwo is not a single Pokémon card, but rather a general term used for both Mega Mewtwo X and Mega Mewtwo Y.
* There are many different versions of Mega Mewtwo X and Y cards: They come in various sets, rarities (like holo, full art, etc.), and even different artwork variations.
To find the specific card you're looking for, you'll need to be more specific. For example, you could ask:
* "Do Mega Mewtwo X and Y cards exist in the XY - BREAKthrough set?"
* "Is there a full art Mega Mewtwo Y card?"
* "What are the different versions of the Mega Mewtwo X card?"
Let me know if you have more details about the specific card you're looking for, and I can help you find more information about it!