| Leonium vs Kazuya | 273–223 | 55.04% |
| Leonium vs Dragunov | 248–199 | 55.48% |
| Leonium vs Bryan | 206–190 | 52.02% |
| Leonium vs Hwoarang | 265–129 | 67.26% |
| Leonium vs Paul | 198–152 | 56.57% |
| Leonium vs King | 168–139 | 54.72% |
| Leonium vs Steve | 137–169 | 44.77% |
| Leonium vs Jin | 164–140 | 53.95% |
| Leonium vs Heihachi | 121–123 | 49.59% |
| Leonium vs Asuka | 123–118 | 51.04% |
| Leonium vs Devil Jin | 132–107 | 55.23% |
| Leonium vs Reina | 130–107 | 54.85% |
| Leonium vs Law | 139–90 | 60.70% |
| Leonium vs Victor | 122–107 | 53.28% |
| Leonium vs Lars | 115–91 | 55.83% |
| Leonium vs Lili | 118–81 | 59.30% |
| Leonium vs Fahkumram | 101–95 | 51.53% |
| Leonium vs Yoshimitsu | 105–83 | 55.85% |
| Leonium vs Shaheen | 101–82 | 55.19% |
| Leonium vs Jun | 96–86 | 52.75% |
| Leonium vs Lee | 90–88 | 50.56% |
| Leonium vs Claudio | 88–84 | 51.16% |
| Leonium vs Lidia | 83–87 | 48.82% |
| Leonium vs Feng | 76–92 | 45.24% |
| Leonium vs Leroy | 104–64 | 61.90% |
| Leonium vs Azucena | 75–92 | 44.91% |
| Leonium vs Alisa | 92–74 | 55.42% |
| Leonium vs Leo | 77–76 | 50.33% |
| Leonium vs Jack-8 | 67–83–1 | 44.67% |
| Leonium vs Nina | 66–85 | 43.71% |
| Leonium vs Raven | 61–76–1 | 44.53% |
| Leonium vs Xiaoyu | 63–59 | 51.64% |
| Leonium vs Zafina | 56–61 | 47.86% |
| Leonium vs Anna | 45–61 | 42.45% |
| Leonium vs Eddy | 44–59 | 42.72% |
| Leonium vs Kuma | 41–41 | 50.00% |
| Leonium vs Clive | 36–36 | 50.00% |
| Leonium vs Panda | 26–41 | 38.81% |
| Leonium vs Armor King | 22–19 | 53.66% |
| Leonium vs Miary Zo | 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.