The Illumina Pokémon are the guardians of Lental: six giant, glowing Pokémon, one per island, said to have protected the region from the meteorite two thousand years ago. Each is encountered at its island’s Illumina spot, at the end of the exploration, and can only be scored if it is charged with Illumina energy. Here is how to approach them, based on Serebii.

The Florio Illumina spot.
PokémonIllumina spotHow to photograph it
MeganiumFlorioThe easiest: follow it through the course, hitting it with Illumina Orbs.
WishiwashiMaricopiaHit the Wishiwashi in Solo Form with Illumina Orbs: once gathered, they form School Form.
MiloticBelusylvaIllumina Orbs work poorly on water: bring it up with Fluffruit, then hit it.
VolcaronaVolucaThere are two of them, protected by fire: two Fluffruit remove their aura, then the Illumina Orbs take effect.
SteelixDuriceIt moves from cave to cave: bring it out with Fluffruit and be quick.
XerneasAurusThe last one, inside a sphere of energy: Illumina Orbs on the sphere, then on Xerneas.