| Siiiiiimon vs King | 30–19 | 61.22% |
| Siiiiiimon vs Jin | 23–23 | 50.00% |
| Siiiiiimon vs Law | 16–18 | 47.06% |
| Siiiiiimon vs Clive | 21–12 | 63.64% |
| Siiiiiimon vs Hwoarang | 12–18 | 40.00% |
| Siiiiiimon vs Bryan | 17–13 | 56.67% |
| Siiiiiimon vs Kazuya | 17–6 | 73.91% |
| Siiiiiimon vs Eddy | 13–10 | 56.52% |
| Siiiiiimon vs Paul | 15–5 | 75.00% |
| Siiiiiimon vs Yoshimitsu | 9–11 | 45.00% |
| Siiiiiimon vs Steve | 11–8 | 57.89% |
| Siiiiiimon vs Dragunov | 10–9 | 52.63% |
| Siiiiiimon vs Victor | 9–9 | 50.00% |
| Siiiiiimon vs Xiaoyu | 9–8 | 52.94% |
| Siiiiiimon vs Heihachi | 7–10 | 41.18% |
| Siiiiiimon vs Alisa | 7–9 | 43.75% |
| Siiiiiimon vs Lili | 7–8 | 46.67% |
| Siiiiiimon vs Devil Jin | 6–8 | 42.86% |
| Siiiiiimon vs Asuka | 5–7 | 41.67% |
| Siiiiiimon vs Nina | 7–5 | 58.33% |
| Siiiiiimon vs Lee | 6–6 | 50.00% |
| Siiiiiimon vs Reina | 8–3 | 72.73% |
| Siiiiiimon vs Azucena | 4–7 | 36.36% |
| Siiiiiimon vs Jack-8 | 3–7 | 30.00% |
| Siiiiiimon vs Anna | 4–6 | 40.00% |
| Siiiiiimon vs Jun | 6–3 | 66.67% |
| Siiiiiimon vs Lidia | 5–4 | 55.56% |
| Siiiiiimon vs Feng | 2–5 | 28.57% |
| Siiiiiimon vs Raven | 5–2 | 71.43% |
| Siiiiiimon vs Leroy | 5–1 | 83.33% |
| Siiiiiimon vs Lars | 3–2 | 60.00% |
| Siiiiiimon vs Claudio | 3–2 | 60.00% |
| Siiiiiimon vs Shaheen | 1–2 | 33.33% |
| Siiiiiimon vs Panda | 1–2 | 33.33% |
| Siiiiiimon vs Armor King | 2–1 | 66.67% |
| Siiiiiimon vs Zafina | 1–1 | 50.00% |
| Siiiiiimon vs Leo | 0–1 | 0.00% |
| Siiiiiimon vs Kuma | 0–1 | 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.