| Billy vs Steve | 3–7 | 30.00% |
| Billy vs Reina | 5–5 | 50.00% |
| Billy vs Law | 3–3 | 50.00% |
| Billy vs Hwoarang | 0–6 | 0.00% |
| Billy vs Yoshimitsu | 0–4 | 0.00% |
| Billy vs Jin | 1–3 | 25.00% |
| Billy vs Lili | 0–4 | 0.00% |
| Billy vs King | 2–1 | 66.67% |
| Billy vs Asuka | 0–3 | 0.00% |
| Billy vs Claudio | 3–0 | 100.00% |
| Billy vs Azucena | 0–3 | 0.00% |
| Billy vs Victor | 0–3 | 0.00% |
| Billy vs Xiaoyu | 0–2 | 0.00% |
| Billy vs Dragunov | 0–2 | 0.00% |
| Billy vs Lars | 1–1 | 50.00% |
| Billy vs Alisa | 2–0 | 100.00% |
| Billy vs Lee | 0–2 | 0.00% |
| Billy vs Leroy | 0–2 | 0.00% |
| Billy vs Eddy | 0–2 | 0.00% |
| Billy vs Kazuya | 0–1 | 0.00% |
| Billy vs Devil Jin | 1–0 | 100.00% |
| Billy vs Shaheen | 1–0 | 100.00% |
| Billy vs Kuma | 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.