Is Ptera good?

This account belonged to my older brother. Is it any good?

Yes

You have a lot of stardust.

I don't know either.

It's good when the hawk evolves.

Also, Pteranodons appear more often in the wild than you might think, so you can catch those and make mezan.

It's good for beginners.

There are many better Pokémon to replace Aerodactyl, like Tyranitar and Rhyperior. Also, when you power up Aerodactyl, its CP doesn't get that high for the cost (just over 3000 CP?). However, if you catch and train Pokémon like Tyranitar or Rhyperior, their CP increases significantly compared to the Stardust cost, and they are used more often. (Tyranitar: Raids / (Gigantamax) Rhyperior: Raids, Max Battles) Still, if you want to train Aerodactyl, you can. Because Pokémon Go is about collecting or performance, if you're going for performance, train the ones I mentioned, and if you're going for collecting, train Aerodactyl. I ended up explaining a lot, so thank you for reading until the end.

The comment right above has the perfect advice.

It's not bad. But you need to save up about 1 million Stardust. If you have an extra one, it's better to release the one with low IVs to Professor Willow!!

I'm already max level...

I heard it's not very practical.