| Koopa vs King | 29–11 | 72.50% |
| Koopa vs Kazuya | 20–14 | 58.82% |
| Koopa vs Steve | 22–12 | 64.71% |
| Koopa vs Jin | 15–17 | 46.88% |
| Koopa vs Jun | 19–11 | 63.33% |
| Koopa vs Nina | 19–10 | 65.52% |
| Koopa vs Armor King | 13–16 | 44.83% |
| Koopa vs Miary Zo | 16–13 | 55.17% |
| Koopa vs Law | 16–9 | 64.00% |
| Koopa vs Lili | 18–7 | 72.00% |
| Koopa vs Victor | 13–12 | 52.00% |
| Koopa vs Clive | 15–10 | 60.00% |
| Koopa vs Reina | 19–5 | 79.17% |
| Koopa vs Lee | 12–10 | 54.55% |
| Koopa vs Bryan | 8–13 | 38.10% |
| Koopa vs Lidia | 13–7 | 65.00% |
| Koopa vs Lars | 10–9 | 52.63% |
| Koopa vs Hwoarang | 10–8 | 55.56% |
| Koopa vs Asuka | 9–8 | 52.94% |
| Koopa vs Dragunov | 10–7 | 58.82% |
| Koopa vs Paul | 8–8 | 50.00% |
| Koopa vs Leroy | 7–9 | 43.75% |
| Koopa vs Eddy | 11–5 | 68.75% |
| Koopa vs Raven | 8–6 | 57.14% |
| Koopa vs Heihachi | 6–7 | 46.15% |
| Koopa vs Leo | 7–5 | 58.33% |
| Koopa vs Alisa | 8–2 | 80.00% |
| Koopa vs Kuma | 6–4 | 60.00% |
| Koopa vs Xiaoyu | 6–3 | 66.67% |
| Koopa vs Jack-8 | 5–4 | 55.56% |
| Koopa vs Azucena | 2–7 | 22.22% |
| Koopa vs Devil Jin | 6–2 | 75.00% |
| Koopa vs Feng | 6–1 | 85.71% |
| Koopa vs Yoshimitsu | 4–2 | 66.67% |
| Koopa vs Claudio | 2–4 | 33.33% |
| Koopa vs Shaheen | 4–2 | 66.67% |
| Koopa vs Fahkumram | 2–4 | 33.33% |
| Koopa vs Anna | 4–0 | 100.00% |
| Koopa vs Zafina | 3–0 | 100.00% |
| Koopa vs Panda | 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.