| billy vs Bryan | 24–18 | 57.14% |
| billy vs Kazuya | 19–22 | 46.34% |
| billy vs Reina | 16–24 | 40.00% |
| billy vs Jin | 17–19 | 47.22% |
| billy vs Yoshimitsu | 13–16 | 44.83% |
| billy vs Paul | 13–12 | 52.00% |
| billy vs Hwoarang | 10–15 | 40.00% |
| billy vs Steve | 7–12 | 36.84% |
| billy vs Lili | 12–7 | 63.16% |
| billy vs King | 10–8 | 55.56% |
| billy vs Dragunov | 12–5 | 70.59% |
| billy vs Law | 5–10 | 33.33% |
| billy vs Devil Jin | 7–8 | 46.67% |
| billy vs Eddy | 8–5 | 61.54% |
| billy vs Asuka | 5–6 | 45.45% |
| billy vs Leo | 5–5 | 50.00% |
| billy vs Jun | 7–3 | 70.00% |
| billy vs Alisa | 2–7 | 22.22% |
| billy vs Armor King | 8–1 | 88.89% |
| billy vs Leroy | 3–5 | 37.50% |
| billy vs Azucena | 6–1 | 85.71% |
| billy vs Raven | 3–4 | 42.86% |
| billy vs Claudio | 2–4 | 33.33% |
| billy vs Feng | 1–4 | 20.00% |
| billy vs Lars | 3–2 | 60.00% |
| billy vs Victor | 2–3 | 40.00% |
| billy vs Xiaoyu | 1–3 | 25.00% |
| billy vs Lee | 0–4 | 0.00% |
| billy vs Shaheen | 2–1 | 66.67% |
| billy vs Nina | 1–2 | 33.33% |
| billy vs Jack-8 | 2–0 | 100.00% |
| billy vs Kuma | 2–0 | 100.00% |
| billy vs Heihachi | 2–0 | 100.00% |
| billy vs Zafina | 0–1 | 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.