The announcement came from a post on Twitter and via a statement on the Nintendo of Belgium website and said that the games will be removed from service and no longer available to download from August 27. Players who still hold Orbs and/or Leaf Tickets - both of which are the in-game currencies that can be purchased - can still spend them until that time. In addition, Nintendo also said that they will no longer be releasing any games that use a real-world cash/micro transaction model in this way in Belgium for the foreseeable future.
Nintendo isn't the only company to make changes to their games after the passing of this law in Belgium however. EA was forced to take FIFA Points offline in the country earlier this year and 2K Games also had to remove microtransactions from the latest version of their NBA 2K series.