| Sonic vs Eddy | 33–60 | 35.48% |
| Sonic vs Hwoarang | 23–42 | 35.38% |
| Sonic vs Kazuya | 30–18 | 62.50% |
| Sonic vs Reina | 14–24 | 36.84% |
| Sonic vs King | 17–20 | 45.95% |
| Sonic vs Jin | 13–24 | 35.14% |
| Sonic vs Lili | 12–23 | 34.29% |
| Sonic vs Dragunov | 9–23 | 28.12% |
| Sonic vs Law | 16–14 | 53.33% |
| Sonic vs Jun | 11–19 | 36.67% |
| Sonic vs Steve | 10–15 | 40.00% |
| Sonic vs Victor | 10–15 | 40.00% |
| Sonic vs Paul | 5–17 | 22.73% |
| Sonic vs Nina | 9–12 | 42.86% |
| Sonic vs Azucena | 11–10 | 52.38% |
| Sonic vs Devil Jin | 8–11 | 42.11% |
| Sonic vs Yoshimitsu | 8–10 | 44.44% |
| Sonic vs Feng | 5–13 | 27.78% |
| Sonic vs Alisa | 10–8 | 55.56% |
| Sonic vs Asuka | 8–9 | 47.06% |
| Sonic vs Leo | 5–12 | 29.41% |
| Sonic vs Kuma | 13–2 | 86.67% |
| Sonic vs Leroy | 6–8 | 42.86% |
| Sonic vs Lars | 5–8 | 38.46% |
| Sonic vs Bryan | 3–9 | 25.00% |
| Sonic vs Raven | 2–7 | 22.22% |
| Sonic vs Claudio | 2–6 | 25.00% |
| Sonic vs Lee | 4–3 | 57.14% |
| Sonic vs Zafina | 4–3 | 57.14% |
| Sonic vs Xiaoyu | 3–3 | 50.00% |
| Sonic vs Jack-8 | 0–5 | 0.00% |
| Sonic vs Clive | 0–4 | 0.00% |
| Sonic vs Lidia | 0–3 | 0.00% |
| Sonic vs Shaheen | 0–2 | 0.00% |
| Sonic vs Panda | 1–0 | 100.00% |
| Sonic vs Heihachi | 0–1 | 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.