why just tekken 6 work why not other work

[Grim.]

hello ad hock work very well i mean great with tekken 6 but same setting everything same and ppsspp not work with other multiplayer games.For example 1) Soul Calibur - Broken Destiny
2) metal slug xx
3)Street Fighter Alpha 3 Max
now question is what is wrong with all other games.only just tekken 6 work.is ppspp multiplayer just made for tekken 6.i use it on local network i mean local multiplayer not on any hamachi or tungle for online purpose.i use latest version 1.4. please help me