Are other trainers' Pokemon ever shiny?

Question

Just curious.

Answer 1

To add onto PrimalKyogres answer, there's been a few other instances where NPCs can have shinies due to the lack of shiny lock.

For example, Wally's Ralts and Professor Juniper's Minncino. Here's a list of all examples of that:

• The Minccino that appears in the "world of Pokémon" intro in Pokémon Black and White.
• Rental Pokémon found in the Battle Factory in Pokémon Emerald.
• Battle Frontier Pokémon used by the AI in Pokémon Platinum.
• The Ralts that Wally catches in Pokémon Ruby, Sapphire, and Emerald.
• The Pokémon that the old man encounters in FireRed and LeafGreen.
• The Poochyena/Zigzagoon that attacks Professor Birch in Pokémon Ruby, Sapphire, and Emerald.
• The Purrloin that Bianca catches in Pokémon Black 2 and White 2.
• The Fletchling that the rival, Calem or Serena, uses in the capture tutorial in Pokémon X and Y.

And as an edit, also the Pokemon that Primal listed, full credits to him:

• A trainer has a shiny Exeggcute in Sun and Moon
• In the trainer tower in FRLG, Burglar Jac has a shiny Meowth, twins Jen and Kira have shiny Espeon, and Fisherman Kaden has a shiny Seaking.

Comments

And the Exeggcute in Sun and Moon

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My answer came after pk just to add a few extras and he already listed that, but if it helps validate mine being BA'd instead i'll edit it when i have a moment and put all the information, including the ones in his answer

Answer 2

Yes, a few times
In Sun and Moon, a trainer has a shiny exeggcute
In the trainer tower in FRLG, Burglar Jac has a shiny Meowth, twins Jen and Kira have shiny Espeon, and Fisherman Kaden has a shiny Seaking.

Source:Experience for the exeggcute and this:
https://gaming.stackexchange.com/questions/288621/is-it-possible-for-npc-trainers-to-have-a-shiny-pokémon