| Costy vs King | 18–33 | 35.29% |
| Costy vs Eddy | 24–23 | 51.06% |
| Costy vs Reina | 22–20 | 52.38% |
| Costy vs Jin | 23–17 | 57.50% |
| Costy vs Kazuya | 12–27 | 30.77% |
| Costy vs Hwoarang | 19–18 | 51.35% |
| Costy vs Asuka | 16–21 | 43.24% |
| Costy vs Steve | 21–14 | 60.00% |
| Costy vs Jun | 20–12 | 62.50% |
| Costy vs Bryan | 15–16 | 48.39% |
| Costy vs Dragunov | 12–18 | 40.00% |
| Costy vs Law | 14–13 | 51.85% |
| Costy vs Yoshimitsu | 11–16 | 40.74% |
| Costy vs Jack-8 | 11–11 | 50.00% |
| Costy vs Lili | 10–12 | 45.45% |
| Costy vs Lars | 13–9 | 59.09% |
| Costy vs Azucena | 9–12 | 42.86% |
| Costy vs Lee | 9–11 | 45.00% |
| Costy vs Victor | 11–8 | 57.89% |
| Costy vs Nina | 14–4 | 77.78% |
| Costy vs Paul | 6–10 | 37.50% |
| Costy vs Leroy | 10–4 | 71.43% |
| Costy vs Claudio | 8–5 | 61.54% |
| Costy vs Devil Jin | 9–3 | 75.00% |
| Costy vs Alisa | 7–5 | 58.33% |
| Costy vs Xiaoyu | 5–4 | 55.56% |
| Costy vs Zafina | 4–5 | 44.44% |
| Costy vs Feng | 2–6 | 25.00% |
| Costy vs Kuma | 3–5 | 37.50% |
| Costy vs Panda | 4–2 | 66.67% |
| Costy vs Leo | 2–3 | 40.00% |
| Costy vs Shaheen | 3–1 | 75.00% |
| Costy vs Raven | 1–3 | 25.00% |
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.