Wishiwashi is one of Pokémon Snap's boss encounters, challenging players to get a photo of the Illumina Pokémon. Here's how to get photos of Pokémon in all of its forms.
Wishiwashi Pokémon Snap: How to Get an Illumina Photo of Wishiwashi
Wishiwashi is an Illumina Pokémon in the Maricopia portion of the Lental region. The fish can be found in its Solo Form and in its School Form.
The first time you visit the Maricopia Illumina Spot, you'll be tasked to take a photo of Wishiwashi while its under the effects of the Illumina. That effect causes colorful circles to appear on the fish's body. If it's not already in that state, you'll need to spend a few Illumina Orbs to get it there.
If you find Wishiwashi in its Solo Form, you'll need to throw Illumina Orbs at several to get them to start glowing. Once enough are glowing, they'll swim away and then return in the School Form. Throw a few more Illumina Orbs at the School Form Wishiwashi and it will gain the Illumina effect. If you don't manage to get your shot before the effect wears off, you can throw some more Illumina Orbs to restore it.
Illumina Flowers scattered around the map can make it easier to hit a group of Solo Form Wishiwashi with a single orb, upping your Illumina Orb efficiency. When the fish gather around one of these flowers, if you hit the flower with an Illumina Orb you'll illuminate all the fish around it.
Take enough photos of Illumina Wishiwashi and you'll fill all the requirements you need to hit.