>>41173484The major problem with Melmetal is that they force it as a premium pokemon that you have to pay for $60. You can get Melmetal from Pokémon Let's Go as it have a trading system with Pokémon Go. Any pokemon you trade from GO to Let's Go or reverse, you get a mystery box in GO. If you open this mystery box, you can catch the pre-evolve form Meltan. You catch a lot of these as it take 400 candy to evolve it. You can't do this the whole day because after the box is open for a hour, it close for the whole day and you have to wait for the next one or trade another Pokémon to Let's Go to GO.
This is literally the fastest way to get this pokemon, I'm not joking. It's extremely tedious and boring. To make matter worse, they still force you to only evolve Melmetal in Pokémon GO. Have with that.