Stanley Yelnats II is the son of Stanley Yelnats I, the father of Stanley Yelnats III, and the grandfather of Stanley Yelnats IV. He lives with the Yelnats family in their apartment and constantly reminds everyone that their bad luck is because of that "no good dirty rotten pig stealin' Elya".
Yelnats II is well-meaning and sarcastic, though his personality is not much elaborated during the film (though he has little screen time).
Role in the film
Stanley Yelnats II mostly serves as a supporting character. He is first seen in a flashback where Stanley IV is brought home and Stanley II tries to reason with the police (though this does not help).