Pokémon GO: The Quest For Mew.

Catching Mew in Pokémon GO

Pokémon Go All-in-One #151 tasks for the shiny Mew Masterwork Research quest

Pokémon GO' Is Letting You Complete Story Quests For Mew, And It Sounds Like A Breath Of Fresh Air

Pokémon Go Jump-Start Research quest tasks and rewards explained

When you haven't evolved Magikarp cause you need a ditto for the mew quest : r/pokemongo

Trainers, It's Time to Conduct Important Pokémon Research! – Pokémon GO

How to get Shiny Mew in Pokemon Go Kanto event - Dexerto

Pokemon Go Adding Mew Through New Quest System

Latios' Pokemon GO Appearance Rattles Mew Quest Seekers - SlashGear

Niantic Defends Against App Clones with Quests & Mew Character for Pokémon GO « Mobile AR News :: Next Reality

Pokemon Go Mew quest begins as Trainers look to Great Throws for Research, Gaming, Entertainment

Shiny Mew Masterwork Research - Leek Duck