| Oniichan vs King | 15–18 | 45.45% |
| Oniichan vs Jin | 22–10 | 68.75% |
| Oniichan vs Bryan | 15–17 | 46.88% |
| Oniichan vs Dragunov | 19–13 | 59.38% |
| Oniichan vs Kazuya | 23–8 | 74.19% |
| Oniichan vs Lili | 19–8 | 70.37% |
| Oniichan vs Lee | 12–13 | 48.00% |
| Oniichan vs Paul | 16–7 | 69.57% |
| Oniichan vs Reina | 18–4 | 81.82% |
| Oniichan vs Victor | 13–8 | 61.90% |
| Oniichan vs Hwoarang | 12–8 | 60.00% |
| Oniichan vs Asuka | 14–5 | 73.68% |
| Oniichan vs Steve | 9–8 | 52.94% |
| Oniichan vs Azucena | 12–5 | 70.59% |
| Oniichan vs Heihachi | 13–4 | 76.47% |
| Oniichan vs Law | 15–1 | 93.75% |
| Oniichan vs Xiaoyu | 10–4 | 71.43% |
| Oniichan vs Devil Jin | 7–7 | 50.00% |
| Oniichan vs Yoshimitsu | 8–5 | 61.54% |
| Oniichan vs Shaheen | 5–8 | 38.46% |
| Oniichan vs Eddy | 9–4 | 69.23% |
| Oniichan vs Lars | 6–6 | 50.00% |
| Oniichan vs Leroy | 4–8 | 33.33% |
| Oniichan vs Leo | 6–5 | 54.55% |
| Oniichan vs Zafina | 8–3 | 72.73% |
| Oniichan vs Raven | 6–4 | 60.00% |
| Oniichan vs Clive | 7–3 | 70.00% |
| Oniichan vs Feng | 3–6 | 33.33% |
| Oniichan vs Jun | 5–4 | 55.56% |
| Oniichan vs Alisa | 5–3 | 62.50% |
| Oniichan vs Jack-8 | 4–1 | 80.00% |
| Oniichan vs Claudio | 4–1 | 80.00% |
| Oniichan vs Kuma | 4–0 | 100.00% |
| Oniichan vs Lidia | 3–1 | 75.00% |
| Oniichan vs Nina | 2–1 | 66.67% |
| Oniichan vs Panda | 3–0 | 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.