I have a question. Can I play my purchased digital Wii U games on the pretendo account? because I don’t want to purchase these games again (physically). NNID and Pretendo are different network. So how do I carry all my digital purchased Wii U and virtual consoles games on pretendo account?
No, you must purchase them with your NNID. PNIDs will NEVER allow that type of stuff to happen, and if you need help transferring saves, use SaveMii.
I have my games on NNID. How do I play them on my pretendo account?
Yes, you should be able to. Should just carry over automatically.