Here's why:
* Evolution Requirements: Starter Pokemon typically evolve through leveling up, sometimes with specific conditions like friendship or learning a certain move. They rarely evolve through Stones.
* Evolutionary Lines: Stones are generally used for Pokemon that evolve through specific paths, allowing trainers to choose which form they want. Starter Pokemon typically have one main evolutionary path.
Example:
* Bulbasaur: Evolves into Ivysaur at level 16, and then into Venusaur at level 32. No Stones are involved.
Exceptions:
* Eevee: Eevee is a special case, as it can evolve into different forms using Stones. However, Eevee isn't a starter Pokemon.
Let me know if you have any other Pokemon questions!