The following table contains every evolution item obtainable in RGBY and its location(s).
All items have the same locations in all versions of Red, Green, Blue, and Yellow.
| Item | Location(s) | Notes |
|---|---|---|
| Fire Stone | Purchase at Celadon Department Store | An infinite number can be obtained. |
| Water Stone | Purchase at Celadon Department Store | An infinite number can be obtained. |
| Leaf Stone | Purchase at Celadon Department Store | An infinite number can be obtained. |
| Thunderstone | Purchase at Celadon Department Store | An infinite number can be obtained. |
| Moon Stone | Mt. Moon 1F | 5 total can be obtained without glitches. |
| Mt. Moon B2F (Hidden) | ||
| Route 2 (Requires Cut) | ||
| Rocket Hideout B2F | ||
| Pokémon Mansion 1F (Hidden) |