| King Willy vs Lidia | 7–7 | 50.00% |
| King Willy vs Jin | 7–6 | 53.85% |
| King Willy vs King | 4–6 | 40.00% |
| King Willy vs Reina | 6–4 | 60.00% |
| King Willy vs Law | 4–3 | 57.14% |
| King Willy vs Asuka | 5–2 | 71.43% |
| King Willy vs Hwoarang | 3–2 | 60.00% |
| King Willy vs Xiaoyu | 1–4 | 20.00% |
| King Willy vs Kazuya | 3–2 | 60.00% |
| King Willy vs Lili | 5–0 | 100.00% |
| King Willy vs Azucena | 1–4 | 20.00% |
| King Willy vs Paul | 0–3 | 0.00% |
| King Willy vs Bryan | 1–2 | 33.33% |
| King Willy vs Devil Jin | 3–0 | 100.00% |
| King Willy vs Lars | 1–2 | 33.33% |
| King Willy vs Jun | 1–2 | 33.33% |
| King Willy vs Miary Zo | 1–2 | 33.33% |
| King Willy vs Yoshimitsu | 2–0 | 100.00% |
| King Willy vs Jack-8 | 1–1 | 50.00% |
| King Willy vs Dragunov | 2–0 | 100.00% |
| King Willy vs Nina | 0–2 | 0.00% |
| King Willy vs Eddy | 0–2 | 0.00% |
| King Willy vs Feng | 1–0 | 100.00% |
| King Willy vs Leo | 0–1 | 0.00% |
| King Willy vs Claudio | 0–1 | 0.00% |
| King Willy vs Lee | 0–1 | 0.00% |
| King Willy vs Kuma | 0–1 | 0.00% |
| King Willy vs Panda | 1–0 | 100.00% |
| King Willy vs Leroy | 1–0 | 100.00% |
| King Willy vs Victor | 1–0 | 100.00% |
| King Willy vs Armor King | 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.