| Mephist0 vs Kazuya | 54–51 | 51.43% |
| Mephist0 vs Heihachi | 44–60 | 42.31% |
| Mephist0 vs Jin | 53–50 | 51.46% |
| Mephist0 vs Reina | 41–45 | 47.67% |
| Mephist0 vs Dragunov | 34–42 | 44.74% |
| Mephist0 vs Bryan | 38–32 | 54.29% |
| Mephist0 vs King | 41–23 | 64.06% |
| Mephist0 vs Lili | 27–29 | 48.21% |
| Mephist0 vs Steve | 20–33 | 37.74% |
| Mephist0 vs Lidia | 23–24 | 48.94% |
| Mephist0 vs Hwoarang | 22–23 | 48.89% |
| Mephist0 vs Law | 19–19 | 50.00% |
| Mephist0 vs Devil Jin | 18–20 | 47.37% |
| Mephist0 vs Asuka | 16–21 | 43.24% |
| Mephist0 vs Azucena | 14–21 | 40.00% |
| Mephist0 vs Jun | 17–17 | 50.00% |
| Mephist0 vs Yoshimitsu | 17–16 | 51.52% |
| Mephist0 vs Victor | 19–13 | 59.38% |
| Mephist0 vs Alisa | 14–17 | 45.16% |
| Mephist0 vs Lee | 18–10 | 64.29% |
| Mephist0 vs Lars | 17–10 | 62.96% |
| Mephist0 vs Leroy | 16–11 | 59.26% |
| Mephist0 vs Feng | 12–13 | 48.00% |
| Mephist0 vs Paul | 7–16 | 30.43% |
| Mephist0 vs Leo | 9–12 | 42.86% |
| Mephist0 vs Nina | 11–10 | 52.38% |
| Mephist0 vs Xiaoyu | 9–7 | 56.25% |
| Mephist0 vs Jack-8 | 5–9 | 35.71% |
| Mephist0 vs Kuma | 10–4 | 71.43% |
| Mephist0 vs Claudio | 7–5 | 58.33% |
| Mephist0 vs Shaheen | 5–6 | 45.45% |
| Mephist0 vs Zafina | 4–7 | 36.36% |
| Mephist0 vs Eddy | 2–6 | 25.00% |
| Mephist0 vs Panda | 5–2 | 71.43% |
| Mephist0 vs Raven | 3–4 | 42.86% |
| Mephist0 vs Fahkumram | 0–3 | 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.