Neopets don't "evolve" into different species or forms. They grow older and get new features as they age, but they remain the same species.
Here's how your Neopet changes as they grow:
* Baby: When you adopt your Neopet, it starts as a baby.
* Teen: As they grow older, they become teens with new animations and features.
* Adult: Once they reach adulthood, they gain more features and abilities, including the ability to have a spouse and raise a family.
* Elderly: Finally, they become elderly, with a slower aging process and often more features.
There are no special items or events that will change your Neopet's species or appearance.
However, there are ways to change your Neopet's appearance:
* Customization: You can use clothes, accessories, and other items to give your Neopet a unique look.
* Paint Brush: You can use a Paint Brush to change your Neopet's color, but not its species.
* Faerie Quests: Occasionally, a Faerie will offer a quest to change your Neopet's color or species. These are very rare and highly sought after.
If you want to change your Neopet's species, you can always adopt a new one! There are many different species to choose from, each with its own unique personality and features.