| Iaion vs King | 19–16 | 54.29% |
| Iaion vs Jin | 14–20 | 41.18% |
| Iaion vs Lidia | 22–9 | 70.97% |
| Iaion vs Kazuya | 9–9 | 50.00% |
| Iaion vs Reina | 6–11 | 35.29% |
| Iaion vs Azucena | 12–5 | 70.59% |
| Iaion vs Yoshimitsu | 10–6 | 62.50% |
| Iaion vs Hwoarang | 13–3 | 81.25% |
| Iaion vs Bryan | 10–6 | 62.50% |
| Iaion vs Steve | 12–4 | 75.00% |
| Iaion vs Paul | 3–11 | 21.43% |
| Iaion vs Dragunov | 3–10 | 23.08% |
| Iaion vs Jun | 7–6 | 53.85% |
| Iaion vs Victor | 7–6 | 53.85% |
| Iaion vs Eddy | 9–4 | 69.23% |
| Iaion vs Lili | 6–3 | 66.67% |
| Iaion vs Raven | 3–6 | 33.33% |
| Iaion vs Law | 3–5 | 37.50% |
| Iaion vs Lars | 4–2 | 66.67% |
| Iaion vs Shaheen | 4–2 | 66.67% |
| Iaion vs Leroy | 2–4 | 33.33% |
| Iaion vs Alisa | 1–4 | 20.00% |
| Iaion vs Nina | 3–2 | 60.00% |
| Iaion vs Xiaoyu | 3–1 | 75.00% |
| Iaion vs Jack-8 | 1–3 | 25.00% |
| Iaion vs Asuka | 1–3 | 25.00% |
| Iaion vs Lee | 2–2 | 50.00% |
| Iaion vs Kuma | 3–1 | 75.00% |
| Iaion vs Claudio | 1–2 | 33.33% |
| Iaion vs Devil Jin | 2–0 | 100.00% |
| Iaion vs Feng | 0–2 | 0.00% |
| Iaion vs Panda | 2–0 | 100.00% |
| Iaion vs Zafina | 0–2 | 0.00% |
| Iaion vs Leo | 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.