Pokemon Arts and Facts - Find us on BlueSkyさんのイラストまとめ

Official artwork of the HM Flash. While all other HMs are needed to proceed the story in at least one game. Flash is an HM that isn't needed at all to proceed in any game.

Official artwork of the HM Strength. In Alola, Strength became exclusive to Machamp, but soon became available to many other Pokemon in Generation 8 by Level up and Breeding.

Official art of the HM Surf. Surf is the HM with the highest base power in battle, originally having 95 BP until Generation 6, where it was lowed to 90 being tied with Fly and Rock Climb.

Artwork of the HM Fly. The artwork visually describes how a small Pokemon like Pidgey is able to carry the weight of a person. Leaf grabs Pidgey by the leg as opposed to riding on top.

Official artwork of the HM Cut. The seems to imply that that the trees are rather elderly and fully grown than small bushes and shrubs seen in game sprites.

The art also features Red in his classic design

Sawsbuck represents the month of Janurary in the Unova Horoscope. It's lucky item is the White Flute. Sawsbuck corresponds with the real life zodiac symbol of Capricorn.

According to interviews with Astuko Nishida and Ken Sugimori, the Bulbasaur line are based on frogs. Bulbasaur was based directly on Venusaur, with Venusaur of the three being designed first. This can be seen in running animations, with Venusaur having long legs and hopping.

In Sword and Shield, every Pokemon type uniform has a sponsor, using the logos to represent these companies. The Normal Type's sponsor is Silph Co., from Red and Green. The Silph logo is not seen anywhere else in the game and originates from HeartGold and SoulSilver.

2019 Holiday Art. This art features Grookey, Scorbunny and Sobble.

The picture of Nickit is from Episode 4 and is my own cropped screenshot, Episode 3 did have them use the Pokedex on an Ivysaur.

I also couldn't find an exact source for the type symbols, but here's the full image showing the TCG and Masters symbols too