| Nidhogg vs Kazuya | 24–23 | 51.06% |
| Nidhogg vs Reina | 28–17 | 62.22% |
| Nidhogg vs Jin | 20–18 | 52.63% |
| Nidhogg vs Steve | 17–20 | 45.95% |
| Nidhogg vs Dragunov | 23–14 | 62.16% |
| Nidhogg vs Bryan | 25–11 | 69.44% |
| Nidhogg vs King | 17–18 | 48.57% |
| Nidhogg vs Hwoarang | 18–17 | 51.43% |
| Nidhogg vs Jun | 17–18 | 48.57% |
| Nidhogg vs Lili | 15–17 | 46.88% |
| Nidhogg vs Yoshimitsu | 13–17 | 43.33% |
| Nidhogg vs Lee | 18–12 | 60.00% |
| Nidhogg vs Paul | 11–16 | 40.74% |
| Nidhogg vs Lars | 12–13 | 48.00% |
| Nidhogg vs Law | 12–12 | 50.00% |
| Nidhogg vs Devil Jin | 14–9 | 60.87% |
| Nidhogg vs Lidia | 10–12 | 45.45% |
| Nidhogg vs Heihachi | 14–8 | 63.64% |
| Nidhogg vs Clive | 11–11 | 50.00% |
| Nidhogg vs Victor | 11–10 | 52.38% |
| Nidhogg vs Claudio | 9–10 | 47.37% |
| Nidhogg vs Asuka | 8–9 | 47.06% |
| Nidhogg vs Xiaoyu | 8–3 | 72.73% |
| Nidhogg vs Feng | 4–7 | 36.36% |
| Nidhogg vs Leo | 7–4 | 63.64% |
| Nidhogg vs Nina | 4–7 | 36.36% |
| Nidhogg vs Azucena | 8–3 | 72.73% |
| Nidhogg vs Alisa | 3–7 | 30.00% |
| Nidhogg vs Leroy | 4–5 | 44.44% |
| Nidhogg vs Raven | 6–3 | 66.67% |
| Nidhogg vs Eddy | 6–3 | 66.67% |
| Nidhogg vs Jack-8 | 5–3 | 62.50% |
| Nidhogg vs Shaheen | 2–3 | 40.00% |
| Nidhogg vs Kuma | 1–4 | 20.00% |
| Nidhogg vs Zafina | 1–2 | 33.33% |
| Nidhogg vs Panda | 2–0 | 100.00% |
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.