| Roonmoon vs King | 20–16 | 55.56% |
| Roonmoon vs Reina | 14–12 | 53.85% |
| Roonmoon vs Heihachi | 11–15 | 42.31% |
| Roonmoon vs Steve | 14–10 | 58.33% |
| Roonmoon vs Hwoarang | 9–13 | 40.91% |
| Roonmoon vs Kazuya | 6–13 | 31.58% |
| Roonmoon vs Law | 7–10 | 41.18% |
| Roonmoon vs Dragunov | 5–12 | 29.41% |
| Roonmoon vs Eddy | 7–10 | 41.18% |
| Roonmoon vs Jin | 8–5 | 61.54% |
| Roonmoon vs Asuka | 5–7 | 41.67% |
| Roonmoon vs Lili | 4–8 | 33.33% |
| Roonmoon vs Azucena | 3–8 | 27.27% |
| Roonmoon vs Fahkumram | 4–7 | 36.36% |
| Roonmoon vs Leo | 4–6 | 40.00% |
| Roonmoon vs Nina | 4–5 | 44.44% |
| Roonmoon vs Bryan | 2–6 | 25.00% |
| Roonmoon vs Alisa | 3–5 | 37.50% |
| Roonmoon vs Lee | 2–6 | 25.00% |
| Roonmoon vs Jun | 6–2 | 75.00% |
| Roonmoon vs Devil Jin | 5–2 | 71.43% |
| Roonmoon vs Feng | 3–4 | 42.86% |
| Roonmoon vs Lars | 3–4 | 42.86% |
| Roonmoon vs Xiaoyu | 2–4 | 33.33% |
| Roonmoon vs Victor | 0–6 | 0.00% |
| Roonmoon vs Yoshimitsu | 3–2 | 60.00% |
| Roonmoon vs Leroy | 2–3 | 40.00% |
| Roonmoon vs Raven | 3–2 | 60.00% |
| Roonmoon vs Lidia | 3–2 | 60.00% |
| Roonmoon vs Paul | 0–4 | 0.00% |
| Roonmoon vs Shaheen | 2–2 | 50.00% |
| Roonmoon vs Kuma | 3–1 | 75.00% |
| Roonmoon vs Clive | 2–2 | 50.00% |
| Roonmoon vs Anna | 2–2 | 50.00% |
| Roonmoon vs Claudio | 0–3 | 0.00% |
| Roonmoon vs Jack-8 | 0–2 | 0.00% |
| Roonmoon vs Armor King | 0–2 | 0.00% |
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.