You Can No Longer Add Points To Wii Shop Channel
As part of winding down the Wii Shop Channel, Nintendo has stopped allowing users to add or purchase Wii Points on the Wii Shop Channel as of March 26, 2018.
All leftover points must be used by January 30, 2019 to purchase Wiiware or any other content on the Wii Shop Channel. Unused points will not be refunded.