List of Pokémon forms by release date/2023

January
Shiny Chespin was released at the start of January 2023 Community Day, while Kecleon was released immediately following Community Day. Hoenn Platinum medal became achievable for the first time.

Regular (1) =

Shiny (3) = PS Chespin PS Quilladin PS Chesnaught

January
Mega Salamence and shiny Dedenne were released at the start of Twinkling Fantasy.

Regular (1) =

Shiny (2) = PS Salamence PS Dedenne

January
Shiny Tapu Koko was released.

Shiny (1) = PS Tapu Koko

January
Shiny Helioptile was released at the start of Crackling Voltage.

Shiny (2) = PS Helioptile PS Heliolisk

February
Mega Gardevoir, shiny Frillish, Heart Trim Furfrou, and Tapu Lele were released at the start of Valentine's Day 2023.

Regular (1) =

Shiny (5) = PS Gardevoir PS Frillish PS Jellicent PS Furfrou PS Tapu Lele

February
Primal Kyogre and Groudon, shiny Unown H, Surskit, Gulpin, Torkoal, Cacnea, Kecleon, Tropius, Relicanth, and Jirachi were released at the start of Pokémon GO Tour: Hoenn - Las Vegas. Since then, all Shiny forms of Hoenn-region Pokémon were released.

Regular (2) =

Shiny (14) = PS Unown PS Surskit PS Masquerain PS Gulpin PS Swalot PS Torkoal PS Cacnea PS Cacturne PS Kecleon PS Tropius PS Relicanth PS Kyogre PS Groudon PS Jirachi