| Onion Joe vs King | 5–21 | 19.23% |
| Onion Joe vs Hwoarang | 2–10 | 16.67% |
| Onion Joe vs Steve | 8–4 | 66.67% |
| Onion Joe vs Dragunov | 7–3 | 70.00% |
| Onion Joe vs Jun | 5–5 | 50.00% |
| Onion Joe vs Eddy | 1–8 | 11.11% |
| Onion Joe vs Paul | 1–7 | 12.50% |
| Onion Joe vs Lee | 1–6 | 14.29% |
| Onion Joe vs Leroy | 6–1 | 85.71% |
| Onion Joe vs Xiaoyu | 6–0 | 100.00% |
| Onion Joe vs Devil Jin | 3–3 | 50.00% |
| Onion Joe vs Reina | 0–6 | 0.00% |
| Onion Joe vs Zafina | 1–4 | 20.00% |
| Onion Joe vs Azucena | 1–4 | 20.00% |
| Onion Joe vs Bryan | 2–2 | 50.00% |
| Onion Joe vs Asuka | 4–0 | 100.00% |
| Onion Joe vs Lili | 0–4 | 0.00% |
| Onion Joe vs Leo | 2–2 | 50.00% |
| Onion Joe vs Nina | 0–4 | 0.00% |
| Onion Joe vs Kuma | 0–4 | 0.00% |
| Onion Joe vs Victor | 0–4 | 0.00% |
| Onion Joe vs Feng | 1–2 | 33.33% |
| Onion Joe vs Jin | 0–2 | 0.00% |
| Onion Joe vs Kazuya | 0–2 | 0.00% |
| Onion Joe vs Lars | 0–2 | 0.00% |
| Onion Joe vs Alisa | 0–2 | 0.00% |
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.