| Mefistofeles vs Law | 167–175 | 48.83% |
| Mefistofeles vs Jin | 141–189 | 42.73% |
| Mefistofeles vs Armor King | 139–190 | 42.25% |
| Mefistofeles vs Kazuya | 120–148 | 44.78% |
| Mefistofeles vs Hwoarang | 127–132 | 49.03% |
| Mefistofeles vs King | 116–119 | 49.36% |
| Mefistofeles vs Bryan | 102–100 | 50.50% |
| Mefistofeles vs Steve | 105–84 | 55.56% |
| Mefistofeles vs Paul | 96–92 | 51.06% |
| Mefistofeles vs Heihachi | 79–107 | 42.47% |
| Mefistofeles vs Nina | 82–61 | 57.34% |
| Mefistofeles vs Yoshimitsu | 78–57 | 57.78% |
| Mefistofeles vs Lili | 83–52 | 61.48% |
| Mefistofeles vs Jun | 59–66 | 47.20% |
| Mefistofeles vs Dragunov | 61–60 | 50.41% |
| Mefistofeles vs Eddy | 45–68 | 39.82% |
| Mefistofeles vs Xiaoyu | 73–39 | 65.18% |
| Mefistofeles vs Fahkumram | 43–63 | 40.57% |
| Mefistofeles vs Devil Jin | 35–56 | 38.46% |
| Mefistofeles vs Reina | 39–52 | 42.86% |
| Mefistofeles vs Anna | 44–39 | 53.01% |
| Mefistofeles vs Azucena | 42–40 | 51.22% |
| Mefistofeles vs Lars | 40–41 | 49.38% |
| Mefistofeles vs Victor | 37–44 | 45.68% |
| Mefistofeles vs Feng | 38–42 | 47.50% |
| Mefistofeles vs Lee | 34–38 | 47.22% |
| Mefistofeles vs Asuka | 42–29 | 59.15% |
| Mefistofeles vs Lidia | 35–36 | 49.30% |
| Mefistofeles vs Alisa | 34–36 | 48.57% |
| Mefistofeles vs Miary Zo | 23–35 | 39.66% |
| Mefistofeles vs Jack-8 | 33–21 | 61.11% |
| Mefistofeles vs Raven | 30–23 | 56.60% |
| Mefistofeles vs Clive | 27–23 | 54.00% |
| Mefistofeles vs Claudio | 16–25 | 39.02% |
| Mefistofeles vs Leroy | 15–22–1 | 40.54% |
| Mefistofeles vs Leo | 18–16 | 52.94% |
| Mefistofeles vs Zafina | 20–13 | 60.61% |
| Mefistofeles vs Panda | 15–15 | 50.00% |
| Mefistofeles vs Kuma | 15–12 | 55.56% |
| Mefistofeles vs Shaheen | 4–11 | 26.67% |
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.