Bulbagarden - The original Pokémon communityさんのイラストまとめ

'This Pokémon has a jaw that's as sharp as a spear and as strong as steel. Apparently Barraskewda's flesh is surprisingly tasty, too.'

https://t.co/nBlA6G2F0a

'Clauncher's claws can fall off during battle, but they'll regenerate. The meat inside the claws is popular as a delicacy in Galar.'

https://t.co/oITP6jFk9a

'In the past, it often appeared on the dinner table. The meat of red-striped Basculin is on the fatty side, and it's more popular with the youth.'

https://t.co/43zwEOCcyJ

@JamesTurner_42 The realness of places like Spikemuth, the simple beauty of Postwick juxtaposed with the colourful commercialism of Wyndon - these all help make Galar one of the best facsimiles of the UK you’ll find in gaming. 4/4

'Evolution'

Of course, it'd be remiss not to wish a happy WINTER solstice to those in the southern hemisphere! Staff artist @SuperSiriusXIII has got their Bob Ross on and decorated this happy little tre- wait a second...

If the Stonehenge inspiration wasn't obvious enough, the Pokédex tells us that 'Once a year, on a specific date and at a specific time, they gather out of nowhere and form up in a circle.' That sure sounds like the summer solstice to us!

The correct answer is coming in thick and fact - so we can confirm that the mystery 'mon is indeed the Big Rock Pokémon, Stonjourner!

I’M GOING UNDERGROUND (going underground)
Let Hoenn’s trumpets play and let Piplup Pound
GOING UNDERGROUND (going underground)
Well, let Clefairy Sing and let Loudred shout for tomorrOOOW

Hands up - who's excited?