A Question about Pokken Tournament!

Haii!

I wasn't really sure where to post this but I'm lobbing it here for now.

What I wanted to ask about is who has the game here and who got the special Mewtwo amiibo card when it first came out? I've noticed that the regular game without the card is £10~ cheaper than with the card..

Is getting Shadow Mewtwo that early worth it? Or should I just enjoy the game and unlock Shadow Mewtwo whenever the time comes. I haven't saw much of the story but I am guessing that's how you unlock it. I'd understand though if the card was the only way to obtain him.

Hope someone can shed some light on this!

-Tamm