Originally Posted by Sandrie
I highly doubt that Giovanni or Oak is Ash's father. At least if you follow canon with the manga/game.
In FireRed/LeafGreen this one Team Rocket guy mentioned that "Giovanni's kid has red hair." (the Sevii Island, at the team rocket HQ) Now the only guy I can think of that has red hair is Silver/rival from gold/silver/jerkface.
In the manga I never actually got to the part but the way it is implied is so obvious >_> (Check out the FireRed/LeafGreen saga)
But I guess the anime could be a different story.
Originally Posted by Sodacan
There's an event in HG/SS activated by an event Celebi that reveals that Giovanni is Silver's father.
I kinda forgot what happens in Silver's Scenario but If memory serves...
Him and Blue were kidnapped by a masked man "Giovanni"? and were raised.
-Also to serve him.
But I wouldn't say By blood they are related.. More Like a step father.
However.. there are rumors going around that someone we all know is Silver's Mother! (blood)
And mother of his mother! that works for Giovanni!
( Not sure about the last one but the first one.. there are rumors about that as well. . - .