Pokémon can change a lot when they evolve. Sentret change from tiny round animals into big, skinny animals who are longer than I am tall, and Archeops and Golurk couldn`t fly before they evolved. Some of them don`t change much though. When Spearow evolve into Fearow they just become larger birds.

It`s interesting to see all the different kinds of Pokémon that there are.