Solosis Pokemon GO is a new psychic type that was added to the game with the start of the Pokemon GO: Psychic Spectacular event.
The new event is increasing the spawn of Psychic-type Pokemon, and Pokémon like Solosis, Abra, Ralts, Spoink, Beldum, and Gothita will be hatching from two kilometer eggs. But first, you gotta catch the new guy. Here's how to snatch yourself a Solosis.
Solosis Pokemon GO: How to Catch
Solosis has two evolutions, Duosion and Reuniclus. You can find the new psychic-type in the wild with the increased spawn for its class, and you can hatch it from a 2-kilometer egg.
When the Pokemon Go event ends on the morning of the 30, Solosis won't disappear along with it. Instead, you can still discover it in the wild and potentially in an egg. You can only find it during the day as it won't appear at night.
So go out during the day and snag the bubble Pokemon.