Pokémon Gold Version, Silver Version, and Crystal Version - Unown
This is the formula to find the form of an Unown:
UnownLetter = ((A+B+C+D)/10)+1
where A, B, C, and D are based on the Pokémon’s diversification values (individual values) as follows:
| Diversification Value | A (Attack) | B (Defense) | C (Speed) | D (Special) |
| 0, 1, 8, 9 | 0 | 0 | 0 | 0 |
| 2, 3, 10, 11 | 64 | 16 | 4 | 1 |
| 4, 5, 12, 13 | 128 | 32 | 8 | 2 |
| 6, 7, 14, 15 | 192 | 48 | 12 | 3 |
The result, UnownLetter, is the position in the alphabet of the Unown shape (for example "A" if the result is 1).