| Nidhogg vs King | 14–17 | 45.16% |
| Nidhogg vs Reina | 7–16 | 30.43% |
| Nidhogg vs Jin | 9–11 | 45.00% |
| Nidhogg vs Yoshimitsu | 4–13 | 23.53% |
| Nidhogg vs Steve | 8–9 | 47.06% |
| Nidhogg vs Lili | 7–8 | 46.67% |
| Nidhogg vs Law | 7–7 | 50.00% |
| Nidhogg vs Lars | 7–6 | 53.85% |
| Nidhogg vs Azucena | 10–3 | 76.92% |
| Nidhogg vs Bryan | 6–6 | 50.00% |
| Nidhogg vs Lidia | 6–6 | 50.00% |
| Nidhogg vs Kazuya | 4–6 | 40.00% |
| Nidhogg vs Paul | 3–6 | 33.33% |
| Nidhogg vs Victor | 4–5 | 44.44% |
| Nidhogg vs Hwoarang | 3–5 | 37.50% |
| Nidhogg vs Alisa | 4–3 | 57.14% |
| Nidhogg vs Dragunov | 0–6 | 0.00% |
| Nidhogg vs Nina | 3–3 | 50.00% |
| Nidhogg vs Lee | 5–1 | 83.33% |
| Nidhogg vs Jun | 4–2 | 66.67% |
| Nidhogg vs Raven | 2–4 | 33.33% |
| Nidhogg vs Claudio | 2–3 | 40.00% |
| Nidhogg vs Eddy | 4–1 | 80.00% |
| Nidhogg vs Xiaoyu | 2–2 | 50.00% |
| Nidhogg vs Jack-8 | 0–3 | 0.00% |
| Nidhogg vs Shaheen | 0–3 | 0.00% |
| Nidhogg vs Leroy | 2–1 | 66.67% |
| Nidhogg vs Asuka | 1–1 | 50.00% |
| Nidhogg vs Leo | 2–0 | 100.00% |
| Nidhogg vs Kuma | 1–1 | 50.00% |
| Nidhogg vs Panda | 0–2 | 0.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.