| IronMountain vs Kazuya | 10–4 | 71.43% |
| IronMountain vs Fahkumram | 7–2 | 77.78% |
| IronMountain vs Paul | 7–1 | 87.50% |
| IronMountain vs Law | 4–4 | 50.00% |
| IronMountain vs Dragunov | 3–5 | 37.50% |
| IronMountain vs Asuka | 2–5 | 28.57% |
| IronMountain vs Lili | 6–1 | 85.71% |
| IronMountain vs Feng | 5–1 | 83.33% |
| IronMountain vs Eddy | 4–2 | 66.67% |
| IronMountain vs Hwoarang | 5–0 | 100.00% |
| IronMountain vs Xiaoyu | 4–1 | 80.00% |
| IronMountain vs Jin | 5–0 | 100.00% |
| IronMountain vs Bryan | 5–0 | 100.00% |
| IronMountain vs Lars | 1–4 | 20.00% |
| IronMountain vs Jun | 2–3 | 40.00% |
| IronMountain vs Steve | 4–0 | 100.00% |
| IronMountain vs Devil Jin | 2–2 | 50.00% |
| IronMountain vs Leo | 2–2 | 50.00% |
| IronMountain vs Kuma | 4–0 | 100.00% |
| IronMountain vs Leroy | 2–2 | 50.00% |
| IronMountain vs Reina | 2–2 | 50.00% |
| IronMountain vs King | 1–2 | 33.33% |
| IronMountain vs Yoshimitsu | 2–1 | 66.67% |
| IronMountain vs Azucena | 2–1 | 66.67% |
| IronMountain vs Anna | 2–1 | 66.67% |
| IronMountain vs Claudio | 2–0 | 100.00% |
| IronMountain vs Nina | 0–1 | 0.00% |
| IronMountain vs Zafina | 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.