Why does my Pokemon sparkle when it comes out of its pokeball?

Question

So I have a female Meowstic in Pokemon Moon and she sparkles when she comes out of her pokeball. No, she is not shiny. Here is her information if it helps:

• Caught in a Luxury Ball
• Nature: Bold
• Characteristic: Highly persistent
• Seems to have traveled across both space and time to reach you from the Kalos region
• Ability: Infiltrator ("Passes through the opposing Pokemon's barrier, substitute, and the like and strikes")
• I caught her myself in Pokemon Y
• Level 25
• Hp: 73
• Sp. Atk: 50
• Sp. Def: 47
• Attack: 28
• Defense: 52
• Speed: 59
• Extra information: She sparkled as a Espurr too

Comments

Maybe it came from Pokebank. Espurr can not be found in Sun/Moon.

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But I've transferred a good few Pokémon from pokebank and not all of them sparkle while not being shiny. My Garchomp is from the Kalos region but you can find Gible in the game.

Answer 1

That's the visual effect of the luxury ball. It's just a visual, similarly to the Beast Ball for the Ultra Beasts.

Comments

But my Pokémon is in a Great Ball and it's also not a shiny.