Tools like and GraphicsGale are industry standards here. Some creators even rip 3D models from Scarlet/Violet , render them at low resolution, and manually trace over the frames to create authentic-looking pixel art.
The official sprite sheets for Gen 9 Pokémon have been released, showcasing the front and back views of each Pokémon. Here are some observations: pokemon gen 9 sprites
Some Gen 9 Pokémon have particularly notable sprites: Tools like and GraphicsGale are industry standards here
Because official sprites don’t exist, the Pokémon fangame community has stepped up massively. Artists are creating for all 120+ new Pokémon, including alternate forms. These come in two major flavors: render them at low resolution