Alright, so I was using loadiine as usual and tried to use Mario Tennis Ultra Smash. I't wouldn't work so i did some troubleshooting. At that time the file structure was as followed. wiiu > games > Mario Tennis Ultra Smash, basically the game would not load at this state. Once I added the correct title id everything functioned correctly. I am creating this thread just to state the fact that in the gx2 thread it states that [XXXXX] works as a title id, which in my case and possibly others doesn't.
gametdb.com
Mario Tennis Ultra Smash (Incorrect)
Mario Tennis Ultra Smash [XXXXX] (Incorrect)
Mario Tennis Ultra Smash [AVXE01] (Correct)
If you don't know the titleID but don't care about the game cover, you can use a random TitleID6, or just use [XXXXXX]
gametdb.com
Mario Tennis Ultra Smash (Incorrect)
Mario Tennis Ultra Smash [XXXXX] (Incorrect)
Mario Tennis Ultra Smash [AVXE01] (Correct)