Pokémon Go ‘Sizable Surprises’ event, Collection Challenge guide
From April 4-9, Pokémon Go is celebrating the biggest and smallest Pokémon in its “Sizable Surprises” event. We detail all the perks and new releases here.
This article references relevant content from the polygon.com website. Original article link: [https://www.polygon.com/pokemon-go-guide/2024/4/4/24121052/sizable-surprises-event-collection-challenge-shiny-wimpod]

Pokémon Go is hosting an event to celebrate Pokémon of very small or very big sizes from April 4-9. “Sizable Surprises” brings out all sorts of Pokémon that really push the limit on just how colossal or tiny a Pokémon can be.
During the event, you’ll get double XP for nice or better throws plus an increased chance to find XXS and XXL Pokémon. The chance to find shiny Wailmer is also increased.
During this event, Wimpod and it’s evolution, Golisopod, are also making their shiny debut, so keep your eyes out for a special red-trimmed bug.

The two Ultra Beasts from different hemispheres, Celesteela and Kartana, are also available shiny for the first time.

Below we list out all the perks and bonuses of the Pokémon Go “Sizable Surprises” event, including the Collection Challenge.
Pokémon Go ‘Sizeable Surprises’ Collection Challenges
There are two Collection Challenges that involve catching the following during the event:
Rewards: 3,000 XP, 10 Pinap Berries, Wailmer encounter
Rewards: 3,000 XP, 10 Razz Berries, Wimpod encounter
Pokémon Go ‘Sizeable Surprises’ event Field Research and rewards
Spinning a PokéStop or gym during this event may yield one of the following tasks:
Pokémon Go ‘Sizeable Surprises’ event boosted spawns
The following Pokémon will spawn more frequently throughout the event:
Pokémon Go ‘Sizeable Surprises’ event raid targets
These Pokémon will be in raids during the event: