| P0SEIDONI vs Heihachi | 18–3 | 85.71% |
| P0SEIDONI vs King | 8–1 | 88.89% |
| P0SEIDONI vs Kazuya | 7–2 | 77.78% |
| P0SEIDONI vs Azucena | 4–4 | 50.00% |
| P0SEIDONI vs Law | 5–0 | 100.00% |
| P0SEIDONI vs Devil Jin | 4–1 | 80.00% |
| P0SEIDONI vs Victor | 4–1 | 80.00% |
| P0SEIDONI vs Jin | 2–2 | 50.00% |
| P0SEIDONI vs Reina | 4–0 | 100.00% |
| P0SEIDONI vs Yoshimitsu | 3–0 | 100.00% |
| P0SEIDONI vs Hwoarang | 2–1 | 66.67% |
| P0SEIDONI vs Jack-8 | 3–0 | 100.00% |
| P0SEIDONI vs Lili | 3–0 | 100.00% |
| P0SEIDONI vs Dragunov | 3–0 | 100.00% |
| P0SEIDONI vs Nina | 3–0 | 100.00% |
| P0SEIDONI vs Paul | 1–1 | 50.00% |
| P0SEIDONI vs Zafina | 0–2 | 0.00% |
| P0SEIDONI vs Lidia | 0–2 | 0.00% |
| P0SEIDONI vs Asuka | 0–2 | 0.00% |
| P0SEIDONI vs Steve | 1–0 | 100.00% |
| P0SEIDONI vs Raven | 1–0 | 100.00% |
| P0SEIDONI vs Bryan | 1–0 | 100.00% |
| P0SEIDONI vs Feng | 0–1 | 0.00% |
| P0SEIDONI vs Alisa | 1–0 | 100.00% |
| P0SEIDONI vs Kuma | 1–0 | 100.00% |
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.