| Mephysto vs Jin | 85–41 | 67.46% |
| Mephysto vs King | 72–45 | 61.54% |
| Mephysto vs Kazuya | 58–48 | 54.72% |
| Mephysto vs Dragunov | 50–32 | 60.98% |
| Mephysto vs Bryan | 44–33 | 57.14% |
| Mephysto vs Heihachi | 43–34 | 55.84% |
| Mephysto vs Eddy | 31–38 | 44.93% |
| Mephysto vs Lili | 38–30 | 55.88% |
| Mephysto vs Hwoarang | 36–24 | 60.00% |
| Mephysto vs Azucena | 36–21 | 63.16% |
| Mephysto vs Reina | 32–23 | 58.18% |
| Mephysto vs Steve | 35–16 | 68.63% |
| Mephysto vs Lars | 29–22 | 56.86% |
| Mephysto vs Law | 25–25 | 50.00% |
| Mephysto vs Asuka | 26–23 | 53.06% |
| Mephysto vs Devil Jin | 30–16 | 65.22% |
| Mephysto vs Nina | 26–18 | 59.09% |
| Mephysto vs Xiaoyu | 19–22 | 46.34% |
| Mephysto vs Victor | 25–16 | 60.98% |
| Mephysto vs Yoshimitsu | 22–16 | 57.89% |
| Mephysto vs Lee | 21–16 | 56.76% |
| Mephysto vs Lidia | 20–17 | 54.05% |
| Mephysto vs Alisa | 14–22 | 38.89% |
| Mephysto vs Paul | 15–20 | 42.86% |
| Mephysto vs Jun | 24–11 | 68.57% |
| Mephysto vs Leroy | 14–20 | 41.18% |
| Mephysto vs Armor King | 19–11 | 63.33% |
| Mephysto vs Jack-8 | 14–14 | 50.00% |
| Mephysto vs Feng | 13–13 | 50.00% |
| Mephysto vs Leo | 8–14 | 36.36% |
| Mephysto vs Shaheen | 7–15 | 31.82% |
| Mephysto vs Clive | 6–13 | 31.58% |
| Mephysto vs Claudio | 10–8 | 55.56% |
| Mephysto vs Kuma | 8–7 | 53.33% |
| Mephysto vs Fahkumram | 8–6 | 57.14% |
| Mephysto vs Zafina | 4–8 | 33.33% |
| Mephysto vs Raven | 5–3 | 62.50% |
| Mephysto vs Panda | 4–1 | 80.00% |
| Mephysto vs Miary Zo | 3–2 | 60.00% |
| Mephysto vs Anna | 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.