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Ditto finally released into Pokémon Go

And how you catch him Transforms the game.

Months after launch, you can finally catch Ditto in mobile hit Pokémon Go.

The little jelly camouflage Pokémon was quietly unlocked in the game last night, when players discovered that other, regular Pokémon were revealing themselves as Dittos in disguise after they had been caught.

This means you won't see Ditto on your map - you'll have to hunt down normal critters and hope they turn into Ditto once inside one of your Pokéballs.

It's a neat mechanic - and it makes every Pidgey, every Zubat, every Rattata worth catching again. If you need an extra hand, our how to find and catch Ditto in Pokémon Go guide can help.

Here's how it looks:

Ditto's release has been on the cards after a recent leak found its data had been added to the game. Developer Niantic has also this week launched a Thanksgiving event with double XP and Stardust - making this a good time to encourage players back.

We recently chatted with Pokémon Go developer Niantic for a chat about the game's past, present and future - and there were several hints at what might be coming next, as well as word that Niantic wanted the game to last as long as MMO king World of Warcraft.

Ditto was just one of the upcoming launches, as well as the global roll-out of the game's long-awaited Nearby feature to improve tracking by pinning down Pokémon to close-by PokéStops.