A beautiful, shiny Gardevoir, in a forest in Galar.

When shiny, all stages of the Gardevoir/Gallade line have beautiful amber eyes, blue hair (alongside top half of torso for Gallade, bottom half of torso and inside of the tassets of the dress for Gardevoir, and entirety of the legs on Kirlia) (Like a blue raspberry flavoured ice pop kind of blue), and orange horns (/chest-spikes on the final two stages). Mega Gardevoir's dress turns black, and Mega Gallade's arm-blade edges turn orange. The regular colours are crimson-red eyes, green hair (and everything mentioned in the first set of brackets for this section), and red horns/chest-spikes. Mega Gardevoir's dress is normally white, and Mega Gallade's blades are normally red.

There is another form called bonded Gardevoir, which is basically Ash-Greninja, but for Gardevoir instead of Greninja. (THIS FORM OF GARDEVOIR IS NOT CANON TO POKÉMON IN THE SLIGHTEST!)