| Onion vs King | 52–82 | 38.81% |
| Onion vs Jin | 43–77 | 35.83% |
| Onion vs Kazuya | 44–66 | 40.00% |
| Onion vs Law | 41–53 | 43.62% |
| Onion vs Steve | 41–50 | 45.05% |
| Onion vs Bryan | 38–47 | 44.71% |
| Onion vs Lili | 43–35 | 55.13% |
| Onion vs Heihachi | 30–41 | 42.25% |
| Onion vs Hwoarang | 22–48 | 31.43% |
| Onion vs Eddy | 22–40 | 35.48% |
| Onion vs Reina | 18–38 | 32.14% |
| Onion vs Dragunov | 21–25 | 45.65% |
| Onion vs Clive | 18–25 | 41.86% |
| Onion vs Yoshimitsu | 10–31 | 24.39% |
| Onion vs Jun | 21–20 | 51.22% |
| Onion vs Paul | 16–22 | 42.11% |
| Onion vs Azucena | 19–18 | 51.35% |
| Onion vs Lidia | 17–19 | 47.22% |
| Onion vs Lars | 13–22 | 37.14% |
| Onion vs Devil Jin | 13–21 | 38.24% |
| Onion vs Xiaoyu | 11–20 | 35.48% |
| Onion vs Asuka | 15–15 | 50.00% |
| Onion vs Feng | 11–19 | 36.67% |
| Onion vs Victor | 14–16 | 46.67% |
| Onion vs Jack-8 | 9–14 | 39.13% |
| Onion vs Nina | 12–11 | 52.17% |
| Onion vs Lee | 9–12 | 42.86% |
| Onion vs Raven | 8–10 | 44.44% |
| Onion vs Fahkumram | 7–10 | 41.18% |
| Onion vs Claudio | 6–10 | 37.50% |
| Onion vs Leroy | 6–10 | 37.50% |
| Onion vs Alisa | 1–14 | 6.67% |
| Onion vs Armor King | 4–10 | 28.57% |
| Onion vs Leo | 6–7 | 46.15% |
| Onion vs Kuma | 4–7 | 36.36% |
| Onion vs Anna | 3–4 | 42.86% |
| Onion vs Zafina | 2–4 | 33.33% |
| Onion vs Shaheen | 3–1 | 75.00% |
| Onion vs Panda | 1–3 | 25.00% |
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.