In soul silver can you see a Kanto starter is shiny on preivew or not?

Yes, it is possible to see if a Kanto starter is shiny on the preview screen in Pokémon Soul Silver. When you first encounter the Kanto starters (Bulbasaur, Charmander, and Squirtle) in the game, you will see a short animation of them running towards you. If the starter is shiny, it will have a different coloration or markings compared to the normal version. For example, shiny Bulbasaur will have a lighter green coloration, while shiny Charmander will have a darker orange coloration.