No.449
Porunga v Shenron. Who wins?
Also, can they grant their own wishes??
No.508
Bump
No.511
Neither of them have any combat ability (King Piccolo was able to kill Shenron back in Dragonball) so I'll give Porunga the edge because he has beefier arms.
I suppose they could in theory grant their own wishes, but they have no impetuous to do so. They are merely willing servants who grant wishes. It's like asking if your computer could play its own computer games.