Modern versions of the mod, such as GamerNafz v2.0 , include HD texture packs that significantly improve character models and arenas compared to the original 2011 base game.
If you want a PSP ISO that feels close to WWE 2K19, here are your legitimate options: wwe 2k19 psp iso
The last official WWE game released on the PSP was in 2016. After that, 2K Games and Yuke’s (the developer at the time) ceased production for the PSP. The reasons are straightforward: Modern versions of the mod, such as GamerNafz v2