| Mammal vs King | 33–36 | 47.83% |
| Mammal vs Law | 23–40 | 36.51% |
| Mammal vs Jin | 34–29 | 53.97% |
| Mammal vs Kazuya | 39–24 | 61.90% |
| Mammal vs Hwoarang | 29–24 | 54.72% |
| Mammal vs Steve | 30–23 | 56.60% |
| Mammal vs Azucena | 29–16 | 64.44% |
| Mammal vs Bryan | 18–24 | 42.86% |
| Mammal vs Reina | 21–15 | 58.33% |
| Mammal vs Eddy | 12–22 | 35.29% |
| Mammal vs Paul | 16–16 | 50.00% |
| Mammal vs Dragunov | 16–16 | 50.00% |
| Mammal vs Victor | 18–12 | 60.00% |
| Mammal vs Lili | 14–11 | 56.00% |
| Mammal vs Yoshimitsu | 8–16 | 33.33% |
| Mammal vs Nina | 10–13 | 43.48% |
| Mammal vs Lee | 18–3 | 85.71% |
| Mammal vs Xiaoyu | 11–9 | 55.00% |
| Mammal vs Leo | 9–8 | 52.94% |
| Mammal vs Jun | 10–7 | 58.82% |
| Mammal vs Heihachi | 8–9 | 47.06% |
| Mammal vs Jack-8 | 8–8 | 50.00% |
| Mammal vs Lars | 6–10 | 37.50% |
| Mammal vs Alisa | 7–8 | 46.67% |
| Mammal vs Kuma | 7–8 | 46.67% |
| Mammal vs Feng | 6–7 | 46.15% |
| Mammal vs Leroy | 6–6 | 50.00% |
| Mammal vs Asuka | 6–5 | 54.55% |
| Mammal vs Zafina | 4–7 | 36.36% |
| Mammal vs Lidia | 6–5 | 54.55% |
| Mammal vs Devil Jin | 4–6 | 40.00% |
| Mammal vs Claudio | 5–5 | 50.00% |
| Mammal vs Shaheen | 5–4 | 55.56% |
| Mammal vs Raven | 7–2 | 77.78% |
| Mammal vs Anna | 3–3 | 50.00% |
| Mammal vs Panda | 1–1 | 50.00% |
| Mammal vs Fahkumram | 1–1 | 50.00% |
| Mammal vs Clive | 1–0 | 100.00% |
| Mammal vs Miary Zo | 1–0 | 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.