| Castorum vs King | 46–63 | 42.20% |
| Castorum vs Reina | 47–61 | 43.52% |
| Castorum vs Jin | 36–64 | 36.00% |
| Castorum vs Clive | 54–43 | 55.67% |
| Castorum vs Kazuya | 40–54 | 42.55% |
| Castorum vs Bryan | 34–45 | 43.04% |
| Castorum vs Steve | 35–34 | 50.72% |
| Castorum vs Asuka | 22–36 | 37.93% |
| Castorum vs Law | 27–29 | 48.21% |
| Castorum vs Lidia | 22–30 | 42.31% |
| Castorum vs Lee | 17–34 | 33.33% |
| Castorum vs Hwoarang | 23–26 | 46.94% |
| Castorum vs Heihachi | 30–19 | 61.22% |
| Castorum vs Lili | 27–19 | 58.70% |
| Castorum vs Jun | 22–24 | 47.83% |
| Castorum vs Yoshimitsu | 21–24 | 46.67% |
| Castorum vs Azucena | 21–24 | 46.67% |
| Castorum vs Eddy | 13–31 | 29.55% |
| Castorum vs Dragunov | 17–25 | 40.48% |
| Castorum vs Xiaoyu | 19–20 | 48.72% |
| Castorum vs Paul | 18–20 | 47.37% |
| Castorum vs Nina | 14–22 | 38.89% |
| Castorum vs Victor | 18–18 | 50.00% |
| Castorum vs Alisa | 16–19 | 45.71% |
| Castorum vs Leroy | 18–17 | 51.43% |
| Castorum vs Claudio | 16–17 | 48.48% |
| Castorum vs Lars | 8–20 | 28.57% |
| Castorum vs Feng | 6–15 | 28.57% |
| Castorum vs Devil Jin | 8–11 | 42.11% |
| Castorum vs Kuma | 7–10 | 41.18% |
| Castorum vs Leo | 3–13 | 18.75% |
| Castorum vs Zafina | 8–8 | 50.00% |
| Castorum vs Jack-8 | 6–7 | 46.15% |
| Castorum vs Raven | 6–5 | 54.55% |
| Castorum vs Anna | 3–5 | 37.50% |
| Castorum vs Shaheen | 1–6 | 14.29% |
| Castorum vs Panda | 1–2 | 33.33% |
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.