Guide to Meltan research

Step 1

Spin 5 gyms

Catch 10 Pokémon

Transfer 5 Pokémon 

Reward: 1,000 Stardust, 10 Pokéballs, and an Incubator  

Step 2

Earn 2 candies walking your buddy 

Make 10 great throws

Hatch 3 Eggs 

Reward: 2,000 Stardust, 2 Lucky Eggs, and a Fast TM 

Step 3

Catch a Ditto 

Win 2 Gym battles 

Battle in 2 Raids

Reward: 10 Great Balls, three Incense and three Max Revives

Step 4 

Catch 5 Steel-type Pokémon 

Catch 5 Electric-type Pokémon 

Earn 5 candies walking your buddy 

Reward: 4,000 Stardust, five Pinap Berries, and five Rare Candy

Step 5

Evolve a Grimer

Catch 5 Slugma or Gulpin 

Make 20 great throws 

Reward: 5,000 Stardust, 20 Great Balls, and five Lure Modules

Step 6

Evolve a Magnemite

Catch 5 Exeggcute

Battle in 10 Raids 

Reward:One Silver Pinap Berry, one Metal Coat, and 10 Ultra Balls

Step 7

Evolve a Drowzee

Catch a Cubone

Evolve a Scyther

Reward: 10 Ultra Balls, a Charged TM, and 3 Premium Raid Passes

Step 8

Catch 2 Omanyte or Kabuto

Catch 2 Lileep or Anorith

Catch an Aerodactyl

Reward:

Step 9 

Catch Meltan

Reward: 9,000 Stardust, a Super Incubator, and 5 Meltan Candy.