Abilities:
Soundproof, or something with the same effect
or
Shadow Tag, or something with the same effect
Moves:
Scary Face or something with the same effect
False Swipe
Optional Moves:
Hypnosis
Information about Breeding to get the desired moves would be helpful, but simply mentioning a Pokemon that can have the fallowing desired effects:
Immunity to Roar
Immunity to wild Pokemon using Run
would be greatly appreciated. Any Pokemon mentioned to me I'll do the required research myself to see how it's done. I just need to know which one it is. The only requirement is it has to be something available in Gen IV HG.