| | Gen 1 | Gen 2 | Gen 3 | Gen 4 | Gen 5 |
|---|
| Normal | 22 (14.6%) | 15 (15%) | 18 (13.3%) | 17 (16%) | 17 (10.9%) |
| Fighting | 8 (5.3%) | 3 (3%) | 7 (5.2%) | 7 (6.6%) | 15 (9.6%) |
| Flying | 19 (12.6%) | 19 (19%) | 12 (8.9%) | 14 (13.2%) | 18 (11.5%) |
| Poison | 33 (21.9%) | 4 (4%) | 5 (3.7%) | 8 (7.5%) | 7 (4.5%) |
| Ground | 14 (9.3%) | 10 (10%) | 13 (9.6%) | 10 (9.4%) | 11 (7.1%) |
| Rock | 11 (7.3%) | 7 (7%) | 12 (8.9%) | 7 (6.6%) | 10 (6.4%) |
| Bug | 12 (7.9%) | 10 (10%) | 14 (10.4%) | 9 (8.5%) | 18 (11.5%) |
| Ghost | 3 (2%) | 1 (1%) | 6 (4.4%) | 8 (7.5%) | 9 (5.8%) |
| Steel | 2 (1.3%) | 4 (4%) | 9 (6.7%) | 10 (9.4%) | 12 (7.7%) |
| Fire | 12 (7.9%) | 10 (10%) | 6 (4.4%) | 5 (4.7%) | 15 (9.6%) |
| Water | 32 (21.2%) | 18 (18%) | 28 (20.7%) | 14 (13.2%) | 17 (10.9%) |
| Grass | 14 (9.3%) | 10 (10%) | 17 (12.6%) | 14 (13.2%) | 20 (12.8%) |
| Electric | 9 (6%) | 8 (8%) | 4 (3%) | 7 (6.6%) | 11 (7.1%) |
| Psychic | 14 (9.3%) | 10 (10%) | 20 (14.8%) | 9 (8.5%) | 15 (9.6%) |
| Ice | 5 (3.3%) | 5 (5%) | 6 (4.4%) | 6 (5.7%) | 7 (4.5%) |
| Dragon | 3 (2%) | 1 (1%) | 9 (6.7%) | 6 (5.7%) | 10 (6.4%) |
| Dark | 0 (0%) | 6 (6%) | 10 (7.4%) | 7 (6.6%) | 16 (10.3%) |
| Fairy | 5 (3.3%) | 8 (8%) | 5 (3.7%) | 2 (1.9%) | 1 (0.6%) |