The following table contains every hidden item in Red, Green, Blue, and Yellow and its location. Use the radio buttons above to switch between the Japanese releases (RGBY) and the international releases (RBY).
| Item | Games | Area | Location | Notes | ||
|---|---|---|---|---|---|---|
| Potion | R | B | Y | Viridian City | On the Cut tree to the northwest | |
| Antidote | R | B | Y | Viridian Forest | On the southwestern tile of the tree north of the southern entrance | |
| Potion | R | B | Y | Viridian Forest | One tile west of the Trainer near the northern exit | |
| Ether | R | B | Y | Mt. Moon B2F | In the area accessible from the ladder near the Youngster on 1F, on the rock to the east | |
| Moon Stone | R | B | Y | Mt. Moon B2F | In the area accessible from the northernmost ladder on 1F. At the end of the eastern pathway south of the Fossils, on the wall | |
| Great Ball | R | B | Y | Route 4 | On the eastern half, two tiles north and one west of the tile between the two ledges surrounding the empty plateau east of the Mt. Moon exit | |
| Rare Candy | R | B | Y | Cerulean City | One tile north and three west of the bottom right tile in the backyard of the northwestern house | |
| Elixer | R | B | Y | Route 25 | On the wall in the small path east of the first Hiker | |
| Ether | R | B | Y | Route 25 | One tile east and north of the eastern Lass, on the fence | |
| Full Restore | R | B | Y | Route 5-6 Underground Path | Two tiles west of the northern exit | |
| X Special | R | B | Y | Route 5-6 Underground Path | Two tiles east and seven north of the southern exit | |
| Max Ether | R | B | Y | Vermilion City | On the side of the house east of the Pokémon Fan Club | Requires Surf. |
| Hyper Potion | R | B | Y | S.S. Anne B1F | In the westernmost room | On the bed's pillow. |
| Great Ball | R | B | Y | S.S. Anne Kitchen | In the southeasternmost trash can | |
| Ether | R | B | Y | Route 11 | On a tree north of the eastern gate | |
| Ether | R | B | Y | Route 9 | On the tree next to the ledge south of the northwestern grass patch | |
| Super Potion | R | B | Y | Route 10 | On the northern half, one tile north of the northern cuttable tree between the Pokémon Center and Rock Tunnel | Requires Cut. |
| Max Ether | R | B | Y | Route 10 | On the southern half, on the tree east of the Rock Tunnel exit | |
| Max Elixir | R | B | Y | Power Plant | On the rock northwest of two fake item balls, in the horizontal room at the center | |
| PP Up | R | B | Y | Power Plant | In the room east of the northwesternmost room, in a rock to the north of the eastern dead-end into the rocks | |
| Nugget | R | B | Y | Route 7-8 Underground Path | Three tiles north and ten east of the western exit | |
| Elixer | R | B | Y | Route 7-8 Underground Path | 19 tiles east of the western exit | |
| PP Up | R | B | Y | Celadon City | On the northern tree at the end of the dead end east of the cuttable tree east of the Game Corner | |
| 230 Coins | R | B | Y | Celadon Game Corner | Scattered across the floor in the Game Corner | This image on Bulbapedia shows all locations. |
| PP Up | R | B | Y | Rocket Hideout B1F | On the southeasternmost plant in the center of the floor | |
| Nugget | R | B | Y | Rocket Hideout B3F | One tile east of TM10 | |
| Super Potion | R | B | Y | Rocket Hideout B4F | On the machine north of Giovanni | Requires the Lift Key. |
| Elixer | R | B | Y | Pokémon Tower 5F | One tile east and three south of the western staircase | |
| Hyper Potion | R | B | Y | Route 12 | Eight tiles west and one south of Snorlax, on a tree | |
| Calcium | R | B | Y | Route 13 | One tile east of the Trainer Tips sign | |
| PP Up | R | B | Y | Route 13 | On the tree south of the gap in the fence, west of the Trainer Tips sign | |
| Revive | R | B | Y | Safari Zone West | On the statue southeast of the secret house | |
| Rare Candy | R | B | Y | Route 17 | Four tiles east and two north of the Cue Ball just west of the grass patch | |
| Full Restore | R | B | Y | Route 17 | One tile west and six north of the northernmost wooden sign in the middle patch | |
| Max Revive | R | B | Y | Route 17 | Five tiles west and four south of the southernmost sign in the middle path | |
| PP Up | R | B | Y | Route 17 | Fourteen tiles south of the second Cue Ball from the north on the eastern path | |
| Max Elixer | R | B | Y | Route 17 | Three tiles south and two west of the southernmost Biker | |
| Nugget | R | B | Y | Saffron City | On the desk in Copycat's room | |
| Elixer | R | B | Y | Silph Co. 5F | On the second plant east of the Scientist | |
| Max Potion | R | B | Y | Silph Co. 7F | One tile south and one west of the nurse, on the bed | |
| Nugget | R | B | Y | Seafoam Islands B2F | On a rock in the southern part of the floor | |
| Max Elixer | R | B | Y | Seafoam Islands B3F | On a rock south of the eastern boulder | |
| Ultra Ball | R | B | Y | Seafoam Islands B4F | On the easternmost rock in the southeast | |
| Moon Stone | R | B | Y | Pokémon Mansion 1F | On the fifth pillar northeast of the entrance | |
| Max Revive | R | B | Y | Pokémon Mansion 3F | On the rock north of the northern dead-end in the southwestern area | |
| Rare Candy | R | B | Y | Pokémon Mansion B1F | In the northwest area, on the northwesternmost floor tile of the room with the Secret Key | |
| Max Ether | R | B | Y | Route 23 | On the northwest corner of the island | |
| Ultra Ball | R | B | Y | Route 23 | On the eastern tree of the two trees just north of the water, by the eastern grass patch | |
| Full Restore | R | B | Y | Route 23 | On the rock west of the northwestern grass tile in the northernmost grass patch | |
| Ultra Ball | R | B | Y | Victory Road 2F | On a rock east of the Pokémaniac near Moltres | |
| Full Restore | R | B | Y | Victory Road 2F | On a rock west of the ladder west of the exit | |
| Rare Candy | R | B | Y | Cerulean Cave 1F | On the discolored rock on the platform east of the Full Restore | |
| Ultra Ball | R | B | Y | Cerulean Cave B1F | On the discolored rock in the northeastern area | |
| PP Up | R | B | Y | Cerulean Cave 1F | On a rock south of the Ultra Ball | |
| PP Up | R | B | Y | Cerulean Cave 2F | On a lone rock west of the Max Revive | |
| PP Up | R | B | Y | Cerulean Cave B1F | On a lone rock on the land west of the plateau with the Ultra Ball and Max Revive | |
