| Mephisto vs Jin | 45–38 | 54.22% |
| Mephisto vs King | 29–24 | 54.72% |
| Mephisto vs Law | 26–20 | 56.52% |
| Mephisto vs Hwoarang | 26–13 | 66.67% |
| Mephisto vs Kazuya | 17–21 | 44.74% |
| Mephisto vs Reina | 23–11 | 67.65% |
| Mephisto vs Paul | 15–16 | 48.39% |
| Mephisto vs Yoshimitsu | 16–14 | 53.33% |
| Mephisto vs Bryan | 18–11 | 62.07% |
| Mephisto vs Dragunov | 14–14 | 50.00% |
| Mephisto vs Asuka | 14–6 | 70.00% |
| Mephisto vs Heihachi | 7–12 | 36.84% |
| Mephisto vs Devil Jin | 9–9 | 50.00% |
| Mephisto vs Lili | 14–4 | 77.78% |
| Mephisto vs Jun | 9–7 | 56.25% |
| Mephisto vs Steve | 8–7 | 53.33% |
| Mephisto vs Shaheen | 7–6 | 53.85% |
| Mephisto vs Lidia | 7–6 | 53.85% |
| Mephisto vs Feng | 3–9 | 25.00% |
| Mephisto vs Lee | 7–5 | 58.33% |
| Mephisto vs Alisa | 7–4 | 63.64% |
| Mephisto vs Azucena | 9–2 | 81.82% |
| Mephisto vs Nina | 5–5 | 50.00% |
| Mephisto vs Victor | 5–4 | 55.56% |
| Mephisto vs Eddy | 4–5 | 44.44% |
| Mephisto vs Xiaoyu | 4–4 | 50.00% |
| Mephisto vs Claudio | 7–0 | 100.00% |
| Mephisto vs Raven | 2–5 | 28.57% |
| Mephisto vs Jack-8 | 3–2 | 60.00% |
| Mephisto vs Leo | 1–3 | 25.00% |
| Mephisto vs Lars | 4–0 | 100.00% |
| Mephisto vs Kuma | 1–3 | 25.00% |
| Mephisto vs Leroy | 2–2 | 50.00% |
| Mephisto vs Zafina | 3–0 | 100.00% |
| Mephisto 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.