| Billy vs King | 12–11 | 52.17% |
| Billy vs Kazuya | 15–8 | 65.22% |
| Billy vs Yoshimitsu | 13–9 | 59.09% |
| Billy vs Jin | 6–13 | 31.58% |
| Billy vs Law | 6–12 | 33.33% |
| Billy vs Devil Jin | 6–12 | 33.33% |
| Billy vs Clive | 7–11 | 38.89% |
| Billy vs Steve | 10–7 | 58.82% |
| Billy vs Bryan | 7–9 | 43.75% |
| Billy vs Dragunov | 12–4 | 75.00% |
| Billy vs Leroy | 10–6 | 62.50% |
| Billy vs Reina | 9–6 | 60.00% |
| Billy vs Hwoarang | 7–7 | 50.00% |
| Billy vs Heihachi | 8–6 | 57.14% |
| Billy vs Feng | 9–4 | 69.23% |
| Billy vs Asuka | 5–6 | 45.45% |
| Billy vs Victor | 6–5 | 54.55% |
| Billy vs Jack-8 | 5–5 | 50.00% |
| Billy vs Lars | 5–5 | 50.00% |
| Billy vs Eddy | 1–8 | 11.11% |
| Billy vs Xiaoyu | 6–1 | 85.71% |
| Billy vs Claudio | 3–4 | 42.86% |
| Billy vs Lili | 2–4 | 33.33% |
| Billy vs Alisa | 2–3 | 40.00% |
| Billy vs Nina | 3–2 | 60.00% |
| Billy vs Zafina | 2–3 | 40.00% |
| Billy vs Paul | 0–3 | 0.00% |
| Billy vs Leo | 0–3 | 0.00% |
| Billy vs Azucena | 2–1 | 66.67% |
| Billy vs Raven | 1–2 | 33.33% |
| Billy vs Lidia | 1–2 | 33.33% |
| Billy vs Kuma | 1–2 | 33.33% |
| Billy vs Jun | 2–0 | 100.00% |
| Billy vs Panda | 0–2 | 0.00% |
| Billy vs Lee | 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.