Pokéblock Kit appears in 4 version groups since Generation VI, a Gameplay item in the Key Items pocket
PokéAPI item 772 of 2,223, Gameplay category, Key Items pocket
Effect, in PokéAPI's words
Pokéblock Kit: “Creates and stores Pokéblocks.”
Games
Pokéblock Kit is listed in the text of 4 version groups, first in Generation VI
Game index by generation
IIIIIIIVVVIVIIVIIIIX
Named in
Sun and MoonUltra Sun and Ultra MoonLet's Go Pikachu and Let's Go EeveeSword and Shield