Nintendo has apologised for service issues which rendered the 3DS and Wii U eShop inaccessible for many users over the Christmas period.
The platform holder said it became aware of the network problems on Christmas Day, and issues persisted for the rest of the week.
Many users were unable to redeem digital download codes or create Nintendo Network IDs for their systems.
To combat the problem - which Nintendo accredited to high network traffic - 3DS access to the eShop store was disabled for 12 hours on December 29.
Nintendo was also forced to delay the planned Dec 27 launches of Pokémon Bank and Poké Transporter to an unspecified date in the future.
Users having problems redeeming download codes are advised to check the "Your Downloads" section of the eShop.
Nintendo said in a December 29 statement that the company "does not anticipate any further outages, but will continue to closely monitor the situation".
It added: "We sincerely apologise for this week's inconsistencies and thank you again for your patience and support. We will share more information about the launch of Pokémon Bank and Poké Transporter as soon as possible."