| Shadonai vs Heihachi | 25–11 | 69.44% |
| Shadonai vs Kazuya | 14–10 | 58.33% |
| Shadonai vs Law | 9–10 | 47.37% |
| Shadonai vs King | 11–8 | 57.89% |
| Shadonai vs Steve | 14–3 | 82.35% |
| Shadonai vs Jin | 8–8 | 50.00% |
| Shadonai vs Jun | 10–5 | 66.67% |
| Shadonai vs Eddy | 9–5 | 64.29% |
| Shadonai vs Reina | 9–4 | 69.23% |
| Shadonai vs Paul | 5–7 | 41.67% |
| Shadonai vs Hwoarang | 11–1 | 91.67% |
| Shadonai vs Bryan | 7–5 | 58.33% |
| Shadonai vs Asuka | 10–1 | 90.91% |
| Shadonai vs Lili | 6–5 | 54.55% |
| Shadonai vs Xiaoyu | 8–1 | 88.89% |
| Shadonai vs Alisa | 5–4 | 55.56% |
| Shadonai vs Dragunov | 6–2 | 75.00% |
| Shadonai vs Nina | 7–1 | 87.50% |
| Shadonai vs Yoshimitsu | 7–0 | 100.00% |
| Shadonai vs Lee | 7–0 | 100.00% |
| Shadonai vs Jack-8 | 5–1 | 83.33% |
| Shadonai vs Zafina | 5–1 | 83.33% |
| Shadonai vs Leo | 4–1 | 80.00% |
| Shadonai vs Lars | 4–1 | 80.00% |
| Shadonai vs Azucena | 4–1 | 80.00% |
| Shadonai vs Feng | 4–0 | 100.00% |
| Shadonai vs Shaheen | 3–1 | 75.00% |
| Shadonai vs Victor | 4–0 | 100.00% |
| Shadonai vs Claudio | 1–2 | 33.33% |
| Shadonai vs Leroy | 1–2 | 33.33% |
| Shadonai vs Raven | 2–1 | 66.67% |
| Shadonai vs Devil Jin | 1–1 | 50.00% |
| Shadonai vs Lidia | 1–0 | 100.00% |
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.