| Lil Billiam vs King | 31–59 | 34.44% |
| Lil Billiam vs Steve | 29–32 | 47.54% |
| Lil Billiam vs Reina | 30–25 | 54.55% |
| Lil Billiam vs Jin | 12–27 | 30.77% |
| Lil Billiam vs Dragunov | 14–22 | 38.89% |
| Lil Billiam vs Kazuya | 11–23 | 32.35% |
| Lil Billiam vs Azucena | 14–20 | 41.18% |
| Lil Billiam vs Victor | 10–20 | 33.33% |
| Lil Billiam vs Miary Zo | 11–18 | 37.93% |
| Lil Billiam vs Lili | 10–18 | 35.71% |
| Lil Billiam vs Jun | 9–19 | 32.14% |
| Lil Billiam vs Law | 10–15 | 40.00% |
| Lil Billiam vs Fahkumram | 6–19 | 24.00% |
| Lil Billiam vs Armor King | 11–13 | 45.83% |
| Lil Billiam vs Hwoarang | 6–17 | 26.09% |
| Lil Billiam vs Bryan | 9–13 | 40.91% |
| Lil Billiam vs Leo | 10–12 | 45.45% |
| Lil Billiam vs Alisa | 11–9 | 55.00% |
| Lil Billiam vs Lars | 9–10 | 47.37% |
| Lil Billiam vs Heihachi | 10–9 | 52.63% |
| Lil Billiam vs Lidia | 6–12 | 33.33% |
| Lil Billiam vs Leroy | 9–8 | 52.94% |
| Lil Billiam vs Asuka | 7–9 | 43.75% |
| Lil Billiam vs Nina | 8–7 | 53.33% |
| Lil Billiam vs Eddy | 4–11 | 26.67% |
| Lil Billiam vs Raven | 4–9 | 30.77% |
| Lil Billiam vs Yoshimitsu | 10–2 | 83.33% |
| Lil Billiam vs Claudio | 4–8 | 33.33% |
| Lil Billiam vs Paul | 2–9 | 18.18% |
| Lil Billiam vs Jack-8 | 4–7 | 36.36% |
| Lil Billiam vs Lee | 6–5 | 54.55% |
| Lil Billiam vs Kuma | 2–8 | 20.00% |
| Lil Billiam vs Clive | 4–6 | 40.00% |
| Lil Billiam vs Xiaoyu | 4–4 | 50.00% |
| Lil Billiam vs Feng | 3–4 | 42.86% |
| Lil Billiam vs Panda | 1–6 | 14.29% |
| Lil Billiam vs Devil Jin | 2–4 | 33.33% |
| Lil Billiam vs Shaheen | 2–4 | 33.33% |
| Lil Billiam vs Zafina | 4–1 | 80.00% |
| Lil Billiam vs Anna | 1–2 | 33.33% |
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.