| Mask Boy vs King | 43–41 | 51.19% |
| Mask Boy vs Jin | 29–35 | 45.31% |
| Mask Boy vs Hwoarang | 24–29 | 45.28% |
| Mask Boy vs Kazuya | 31–20 | 60.78% |
| Mask Boy vs Law | 25–23 | 52.08% |
| Mask Boy vs Reina | 21–26 | 44.68% |
| Mask Boy vs Clive | 23–23 | 50.00% |
| Mask Boy vs Bryan | 16–24 | 40.00% |
| Mask Boy vs Dragunov | 16–19 | 45.71% |
| Mask Boy vs Yoshimitsu | 15–18 | 45.45% |
| Mask Boy vs Heihachi | 12–21 | 36.36% |
| Mask Boy vs Nina | 15–15 | 50.00% |
| Mask Boy vs Steve | 10–18 | 35.71% |
| Mask Boy vs Lili | 9–18 | 33.33% |
| Mask Boy vs Alisa | 10–17 | 37.04% |
| Mask Boy vs Lee | 10–16 | 38.46% |
| Mask Boy vs Paul | 12–13 | 48.00% |
| Mask Boy vs Asuka | 13–12 | 52.00% |
| Mask Boy vs Azucena | 9–14 | 39.13% |
| Mask Boy vs Lidia | 7–12 | 36.84% |
| Mask Boy vs Victor | 9–9 | 50.00% |
| Mask Boy vs Jack-8 | 11–6 | 64.71% |
| Mask Boy vs Jun | 7–10 | 41.18% |
| Mask Boy vs Eddy | 7–9 | 43.75% |
| Mask Boy vs Xiaoyu | 7–8 | 46.67% |
| Mask Boy vs Devil Jin | 6–8 | 42.86% |
| Mask Boy vs Feng | 3–6 | 33.33% |
| Mask Boy vs Lars | 5–3 | 62.50% |
| Mask Boy vs Raven | 5–3 | 62.50% |
| Mask Boy vs Kuma | 3–4 | 42.86% |
| Mask Boy vs Leo | 2–4 | 33.33% |
| Mask Boy vs Claudio | 1–4 | 20.00% |
| Mask Boy vs Shaheen | 2–2 | 50.00% |
| Mask Boy vs Leroy | 0–4 | 0.00% |
| Mask Boy vs Zafina | 1–2 | 33.33% |
| Mask Boy vs Panda | 2–0 | 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.