Super Smash Bros. players who own both the 3DS and Wii U version can expect their reward this week.

If you register Super Smash Bros. 3DS and Wii U with Nintendo, you’ll receive the Mewtwo character DLC for free.

NintendoEverything reports codes have begun popping up in the inboxes of eligible Japanese players, with European and North American roll out to follow within 24 hours.

Keep an eye on your relevant inbox, including the spam folder, to unlock Mewtwo as soon as possible. You’ll need to apply the latest patch, so get that done before you redeem the code on the eShop. You have until September 30 to redeem the code.

If you haven’t registered your games, or only own one of them, you can buy Mewtwo separately from April 28. He costs $4 on one platform or $5 on both.