Ride Pager appears in 4 version groups since Generation VII, an Unused item in the Key Items pocket
PokéAPI item 886 of 2,223, Unused category, Key Items pocket
Effect, in PokéAPI's words
Ride Pager: “Allows the player to summon a Ride Pokémon.”
Allows the player to summon a Ride Pokémon. Unused, as this can be done simply by pressing Y.
Games
Ride Pager is listed in the text of 4 version groups, first in Generation VII
Game index by generation
IIIIIIIVVVIVIIVIIIIX
Named in
Sun and MoonUltra Sun and Ultra MoonLet's Go Pikachu and Let's Go EeveeSword and Shield