In Monte Vista from The Sims 3 Store, he is already deceased but still playable. He lives in Poetic Property at 718 Bella Vista Drive, with his wife Silvia, while his son Patrizio lives on another house with his wife and children. Like all deceased Sims in Monte Vista, Valentine has light brown hair and clothes.
He doesn't have a predetermined lifetime wish at the start of the game, making him have different lifetime wish every time players start a new game. His inventory contains his graduation certificate, a book, a guitar and his own tombstone.
Strangely, even though he died as an adult in The Sims 2, his ghost in Monte Vista shows he died as an elder. Since The Sims 3 is set back 50 years from The Sims 2, his life stage is inconsistent with his death in Veronaville. The fact that he has light brown hair in The Sims 3 also suggests that his hair was probably dyed.
Valentine's gravestone does not exist within Veronaville, so he can't be made playable without the use of hacks. As a result, the only indication of Valentine's existence is provided by the family tree of his descendants. He has a hidden picture in SimPE, this happens with many Sims, and the purpose of this thumbnail is unknown.
Resurrection tip
This Sim has no character data and cannot be resurrected in-game. For more information, read this guide.