Question

What does a Pokemon with sparkles mean when it comes out of its pokeball?

Answer 1

Is the Pokemon a different color than normal. If so then you have yourself a shiny Pokemon, which looks like this:

If its not a different color you have two other options. Its either one of N's Pokemon, which sparkle like this:

But if its more of a Star than anything else you have yourself a star in a Pokemon movie though I wouldnt count this as a sparkle, here what it looks like:

Comments

Thanks!

Answer 2

If you mean when the Pokemon is out of the pokeball, then it is a shiny Pokemon.
They are rare Pokemon. If you mean when you throw the pokeball, it is just acool feature to make Pokemon's appearance better.