To qualify for the discounted version, the Wii version of the game must first be either:

Purchased on the Wii Shop on Wii U, or

.

If either of these situations is the case, when you visit the Nintendo eShop on the Wii U the Wii U version will automatically be discounted. The reduced price is $1.00 for NES titles, $1.50 for SNES titles, or $2.00 for N64 titles.