Where is the old man with shiny voltorbs on ptd rock tunnel?

In Pokémon Tower Defense (PTD), the old man with shiny Voltorbs can be found in Rock Tunnel, specifically in the area where you encounter the Electric-type Pokémon. He typically offers players the opportunity to battle and catch the shiny Voltorbs. Make sure to explore the tunnel thoroughly to locate him, as he may be positioned in a less obvious spot or behind obstacles.