| Mephist vs Kazuya | 84–54 | 60.87% |
| Mephist vs Jin | 62–55 | 52.99% |
| Mephist vs Bryan | 55–56 | 49.55% |
| Mephist vs Heihachi | 60–41 | 59.41% |
| Mephist vs Clive | 53–35 | 60.23% |
| Mephist vs Reina | 45–37 | 54.88% |
| Mephist vs Paul | 45–32 | 58.44% |
| Mephist vs Steve | 42–25 | 62.69% |
| Mephist vs Devil Jin | 37–29 | 56.06% |
| Mephist vs Hwoarang | 33–32 | 50.77% |
| Mephist vs King | 40–21 | 65.57% |
| Mephist vs Dragunov | 31–25 | 55.36% |
| Mephist vs Jun | 22–32 | 40.74% |
| Mephist vs Yoshimitsu | 31–22 | 58.49% |
| Mephist vs Lidia | 34–16 | 68.00% |
| Mephist vs Feng | 24–25 | 48.98% |
| Mephist vs Law | 26–19 | 57.78% |
| Mephist vs Asuka | 29–16 | 64.44% |
| Mephist vs Lee | 18–27 | 40.00% |
| Mephist vs Victor | 23–18 | 56.10% |
| Mephist vs Lili | 23–14 | 62.16% |
| Mephist vs Azucena | 17–20 | 45.95% |
| Mephist vs Nina | 18–16 | 52.94% |
| Mephist vs Eddy | 16–18 | 47.06% |
| Mephist vs Lars | 22–10 | 68.75% |
| Mephist vs Leroy | 13–15 | 46.43% |
| Mephist vs Xiaoyu | 16–9 | 64.00% |
| Mephist vs Alisa | 12–13 | 48.00% |
| Mephist vs Fahkumram | 15–10 | 60.00% |
| Mephist vs Claudio | 13–7 | 65.00% |
| Mephist vs Armor King | 9–11 | 45.00% |
| Mephist vs Shaheen | 8–11 | 42.11% |
| Mephist vs Jack-8 | 8–9 | 47.06% |
| Mephist vs Kuma | 8–7 | 53.33% |
| Mephist vs Raven | 7–7 | 50.00% |
| Mephist vs Leo | 6–6 | 50.00% |
| Mephist vs Anna | 8–4 | 66.67% |
| Mephist vs Miary Zo | 4–6 | 40.00% |
| Mephist vs Zafina | 1–6 | 14.29% |
| Mephist vs Panda | 1–2 | 33.33% |
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.