Pokémon Go ‘Ultra Space Wonders’ event Timed Research and rewards
From May 23-28, Pokémon Go will be hosting the “Ultra Space Wonders” event, including the launch of Stakataka and Blacephalon, as well as shiny Mareanie.
This article references relevant content from the polygon.com website. Original article link: [https://www.polygon.com/pokemon-go-guide/2024/5/23/24163304/ultra-space-wonders-event-timed-research-stakataka-blacephalon-shiny-mareanie]

Pokémon Go is hosting an “Ultra Space Wonders” event to wrap up the “World of Wonders” season, which will end in June. The event runs from May 23-28 and it features the debut of the Ultra Beasts Stakataka and Blacephalon.
The event also boosts the spawn of poison-type Pokémon, adds the last leg of the “World of Wonders” Special Research, and rewards doubled XP for winning raids against Ultra Beasts. Mareanie is also available shiny for the first time ever.

Below, we list out all the perks of the Pokémon Go “Ultra Space Wonders” event, including the paid Timed Research, Collection Challenge, and event Field Research.
Pokémon Go ‘Ultra Space Wonders’ event Timed Research and rewards
This is a paid research for $5. Once you buy it, you’ll only have until May 28 at 8 p.m. in your local time to complete it.
The value of the “Ultra Space Wonders” paid research ticket is technically worth it, but I would only buy this if you are really hunting for shiny Mareanie or if you want the Naganadel Wings cosmetic.
Rewards: 4 Premium Battle Passes, Mareanie encounter, Naganadel Wings cosmetic
Pokémon Go ‘Ultra Space Wonders’ event Collection Challenge
There are a few Collection Challenges to complete that involve you catching and evolving specific Pokémon.
Rewards: 1,000 XP, Mareanie encounter
Rewards: 5,000 XP, Mareanie encounter
Rewards: 10,000 XP, Mareanie encounter
Pokémon Go ‘Ultra Space Wonders’ event Field Research and rewards
Spinning a PokéStop during the event period may yield one of these tasks:
Pokémon Go ‘Ultra Space Wonders’ event boosted spawns
These Pokémon will spawn more frequently during the event period:

Pokémon Go ‘Ultra Space Wonders’ event raid targets
The following Pokémon will be in raids during the event: