| Onion vs King | 6–5 | 54.55% |
| Onion vs Jin | 7–2 | 77.78% |
| Onion vs Asuka | 7–1 | 87.50% |
| Onion vs Reina | 4–2 | 66.67% |
| Onion vs Lars | 1–4 | 20.00% |
| Onion vs Hwoarang | 2–2 | 50.00% |
| Onion vs Heihachi | 2–2 | 50.00% |
| Onion vs Kazuya | 2–1 | 66.67% |
| Onion vs Jack-8 | 2–1 | 66.67% |
| Onion vs Devil Jin | 1–2 | 33.33% |
| Onion vs Leo | 1–2 | 33.33% |
| Onion vs Alisa | 0–3 | 0.00% |
| Onion vs Shaheen | 1–2 | 33.33% |
| Onion vs Nina | 1–2 | 33.33% |
| Onion vs Azucena | 2–1 | 66.67% |
| Onion vs Eddy | 0–3 | 0.00% |
| Onion vs Steve | 1–2 | 33.33% |
| Onion vs Law | 2–0 | 100.00% |
| Onion vs Feng | 0–2 | 0.00% |
| Onion vs Lili | 2–0 | 100.00% |
| Onion vs Dragunov | 2–0 | 100.00% |
| Onion vs Victor | 0–2 | 0.00% |
| Onion vs Yoshimitsu | 0–2 | 0.00% |
| Onion vs Jun | 0–2 | 0.00% |
| Onion vs Bryan | 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.