Modders manually update the character textures and move-sets to include stars from the 2015 era, such as The Shield (Roman Reigns, Seth Rollins, Dean Ambrose) and Bray Wyatt , who weren't in the original Wii games.
Interestingly, WWE 2K15 was not officially released for the Wii U, a console that was part of the previous generation of gaming systems. Although the game was compatible with various platforms, the absence of a Wii U version left fans wondering if a workaround could be found. This is where the concept of a Wii ISO comes into play. wwe 2k15 wii iso kickass
Many online results for a "WWE 2K15 Wii ISO" are often one of the following: Modders manually update the character textures and move-sets