| Billguy vs Heihachi | 9–12 | 42.86% |
| Billguy vs Hwoarang | 13–7 | 65.00% |
| Billguy vs Kazuya | 6–7 | 46.15% |
| Billguy vs Jin | 6–6 | 50.00% |
| Billguy vs Reina | 8–4 | 66.67% |
| Billguy vs Paul | 4–7 | 36.36% |
| Billguy vs Steve | 4–7 | 36.36% |
| Billguy vs Panda | 8–1 | 88.89% |
| Billguy vs Victor | 3–6 | 33.33% |
| Billguy vs Yoshimitsu | 3–3 | 50.00% |
| Billguy vs Xiaoyu | 2–4 | 33.33% |
| Billguy vs Feng | 1–4 | 20.00% |
| Billguy vs Leroy | 2–3 | 40.00% |
| Billguy vs King | 3–1 | 75.00% |
| Billguy vs Alisa | 3–1 | 75.00% |
| Billguy vs Nina | 2–2 | 50.00% |
| Billguy vs Raven | 2–2 | 50.00% |
| Billguy vs Devil Jin | 1–2 | 33.33% |
| Billguy vs Lili | 2–1 | 66.67% |
| Billguy vs Azucena | 1–2 | 33.33% |
| Billguy vs Lidia | 1–2 | 33.33% |
| Billguy vs Law | 2–0 | 100.00% |
| Billguy vs Jack-8 | 2–0 | 100.00% |
| Billguy vs Kuma | 2–0 | 100.00% |
| Billguy vs Zafina | 2–0 | 100.00% |
| Billguy vs Jun | 0–2 | 0.00% |
| Billguy vs Dragunov | 1–0 | 100.00% |
| Billguy vs Lars | 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.