The following table contains every hidden item in RGBY and its location.
| Item | Games | Area | Location | Notes | ||
|---|---|---|---|---|---|---|
| Potion | R | B | Y | Viridian City | On the Cut tree to the north | |
| Antidote | R | B | Y | Viridian Forest | On the tree just north of the southern entrance | |
| Potion | R | B | Y | Viridian Forest | One tile left of the Trainer near the northern exit | |
| Ether | R | B | Y | Mt. Moon | On B2F, in the area accessible from the second ladder on 1F. On the rock to the right | |
| Moon Stone | R | B | Y | Mt. Moon | On B2F, in the area accessible from the final ladder on 1F. At the end of the right pathway below the Fossils, on the wall | |
| Great Ball | R | B | Y | Route 4 | On the eastern part of the route, in the middle of the empty plateau just east of Mt. Moon | |
| Rare Candy | R | B | Y | Cerulean City | In the backyard of the house in the northwest | |
| 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 | On B1F, in the fifth room from the right | On the bed's pillow. |
| Great Ball | R | B | Y | S.S. Anne | In the kitchen, in the southernmost trash can on the right | |
| Ether | R | B | Y | Route 11 | On a tree north of the eastern gate | |
| Ether | R | B | Y | Route 9 | On the tree just northeast of the western entrance | |
| Super Potion | R | B | Y | Route 10 | One tile north of the northern cuttable tree between the Pokémon Center and Rock Tunnel | Requires Cut. |
| Max Ether | R | B | Y | Route 10 | In the southern half, on the tree east of the Rock Tunnel exit | |
| Max Elixir | R | B | Y | Power Plant | On a 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 | Northeast of the cuttable tree east of the Game Corner | |
| Coins | R | B | Y | Celadon Game Corner | Scattered across the floor in the Game Corner. This image on Bulbapedia has all locations shown | |
| PP Up | R | B | Y | Rocket Hideout | On B1F. On the southeasternmost plant in the center of the floor | |
| Nugget | R | B | Y | Rocket Hideout | On B3F, one tile east of TM10 | |
| Super Potion | R | B | Y | Rocket Hideout | On the machine north of Giovanni | |
| Elixer | R | B | Y | Pokémon Tower | On 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 | In the West area. On the statue southeast of the secret house | |
| Rare Candy | R | B | Y | Route 17 | Four tiles east and two north of the northernmost Cue Ball | |
| Full Restore | R | B | Y | Route 17 | One tile west and six north of the northernmost wooden sign | |
| Max Revive | R | B | Y | Route 17 | Five tiles west and four south of the fourth wooden sign from the top | |
| PP Up | R | B | Y | Route 17 | 14 tiles south of the second Cue Ball from the top on the east | |
| 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 the Copycat's room | |
| Elixer | R | B | Y | Silph Co. | On 5F, on the second plant east of the Scientist | |
| Max Potion | R | B | Y | Silph Co. | On 7F, one tile south and one west of the nurse, on the bed | |
| Nugget | R | B | Y | Seafoam Islands | On B2F, on a rock in the south of the floor | |
| Max Elixer | R | B | Y | Seafoam Islands | On B3F, on a rock south of the eastern boulder | |
| Ultra Ball | R | B | Y | Seafoam Islands | On B4F, on the easternmost rock in the southeast | |
| Moon Stone | R | B | Y | Pokémon Mansion | On 1F, on the fifth pillar northeast of the entrance | |
| Max Revive | R | B | Y | Pokémon Mansion | On 3F, seven tiles north of the southwest corner, on the rubble | |
| Rare Candy | R | B | Y | Pokémon Mansion | On B1F, on the northwestern floor tile in 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 past the water | |
| Full Restore | R | B | Y | Route 23 | On the northeastern rock west of the northern grass | |
| Ultra Ball | R | B | Y | Victory Road | On 2F, on a rock east of the Pokémaniac | |
| Full Restore | R | B | Y | Victory Road | On 2F, on a rock west of the ladder west of the exit | |
| Rare Candy | R | B | Y | Cerulean Cave | On 1F, on a rock east of the Full Restore | |
| Ultra Ball | R | B | Y | Cerulean Cave | On B1F, on a rock in the northeast area | |
| PP Up | R | B | Y | Cerulean Cave | On 1F, on a rock south of the Ultra Ball | |
| PP Up | R | B | Y | Cerulean Cave | On 2F, on a rock south of the center of the center of the floor | |
| PP Up | R | B | Y | Cerulean Cave | On B1F, on a rock near the waterway to the southwestern plateau | |
