How old is Shade the Echidna?

Shade the Echidna's age is never explicitly stated in the Sonic the Hedgehog canon. However, based on her appearance and role in the games, we can infer she is likely an adult - possibly in her late teens or early twenties.

Here's why:

* Physical Appearance: Shade has a mature and developed physique, and her design doesn't suggest a young teenager.

* Role in the Games: She is portrayed as a skilled and independent fighter, suggesting experience and maturity.

* Interactions: Her interactions with other characters like Knuckles and Rouge don't portray her as a young character.

However, it's important to remember that without official confirmation, her exact age remains speculation.