Pokémon Go Kanto Throwback Challenge event guide - Polygon

From May 1 until May 8, Kanto region Pokémon will be spawning in abundance. There’s also a set of tasks to complete within the week that reward a coveted Mewtwo.

INCOMING! FULL *KANTO RESEARCH* QUEST LINE - SHINY MEWTWO, CHANSEY

Polygon Archives - Pokémon Go guide - Page 14

Polygon Archives - Pokémon Go guide - Page 13

Pokemon GO Guide: How to Get Mewtwo in the Kanto Throwback

Throwback Challenge: Kanto - Leek Duck

Pokémon GO' Releases Throwback Challenges for OG Regions Like Kanto

Pokémon Go Kanto Throwback Challenge event guide - Polygon

Throwback Challenge: Kanto - Leek Duck

Pokémon GO Fest 2019 Chicago, Pokémon GO Wiki

Pokémon GO' Releases Throwback Challenges for OG Regions Like Kanto

Throwback Challenge 2020: Kanto