where to buy Pokemon cards

A simple google for "Pokemon EX Mega cards" will probably find you a fair amount of web sites where you order online.

If you prefer to buy in person so you're sure to get them in time, in Brussels, Woluwe St Lambert I walk past this place quite often:

Smartoys Woluwe Merode
Address: Avenue Georges Henri 367, 1200 Woluwe-Saint-Lambert
Phone: 02 735 47 00
Hours: Open today · 11AM–6:30PM

or there's

Master Games Avenue Georges Henri
Avenue Georges Henri, 367
1200 - Woluwe-Saint-Lambert
02/735.47.00

video game shops are normally the best place for this type of thing. And there's phone numbers so you can call and check to avoid an unnecessary. Besides you can always ask them if they know where to get them if they don't sell them.

which I've just realised are the same place...same address...same telephone number...just different names.

Hi there! There are many online shops available through which you can buy online. I haven't bought the xbox Mega card yet, but Few days back, on my birthday, my friend gifted me by the Acheter Xbox gift card 50 euros(https://www.press-start.com/fr/4-acheter-xbox-gift-card-50e-zone-euro/) for enjoying many games on xbox and subscribing to Live membership which is fun using.