| Joyboy vs Jin | 31–22 | 58.49% |
| Joyboy vs King | 36–16 | 69.23% |
| Joyboy vs Dragunov | 20–26 | 43.48% |
| Joyboy vs Hwoarang | 20–25 | 44.44% |
| Joyboy vs Bryan | 16–25 | 39.02% |
| Joyboy vs Kazuya | 21–18 | 53.85% |
| Joyboy vs Reina | 22–17 | 56.41% |
| Joyboy vs Steve | 17–11 | 60.71% |
| Joyboy vs Lili | 15–12 | 55.56% |
| Joyboy vs Xiaoyu | 9–16 | 36.00% |
| Joyboy vs Eddy | 8–17 | 32.00% |
| Joyboy vs Paul | 11–12 | 47.83% |
| Joyboy vs Law | 13–10 | 56.52% |
| Joyboy vs Yoshimitsu | 13–10 | 56.52% |
| Joyboy vs Victor | 10–13 | 43.48% |
| Joyboy vs Feng | 11–10 | 52.38% |
| Joyboy vs Lars | 11–8 | 57.89% |
| Joyboy vs Jun | 9–10 | 47.37% |
| Joyboy vs Devil Jin | 5–9 | 35.71% |
| Joyboy vs Nina | 7–7 | 50.00% |
| Joyboy vs Lee | 9–5 | 64.29% |
| Joyboy vs Leroy | 6–5 | 54.55% |
| Joyboy vs Raven | 4–7 | 36.36% |
| Joyboy vs Azucena | 3–6 | 33.33% |
| Joyboy vs Claudio | 6–2 | 75.00% |
| Joyboy vs Alisa | 2–5 | 28.57% |
| Joyboy vs Leo | 5–1 | 83.33% |
| Joyboy vs Jack-8 | 4–1 | 80.00% |
| Joyboy vs Asuka | 0–4 | 0.00% |
| Joyboy vs Kuma | 1–3 | 25.00% |
| Joyboy vs Shaheen | 1–1 | 50.00% |
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.