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
Mt. Moon B2F (Hidden) Route 2 (Requires Cut) Rocket Hideout Pokémon Mansion 1F (Hidden) |
5 total can be obtained without glitches. |