| Marshmallon vs Kazuya | 334–246 | 57.59% |
| Marshmallon vs Jin | 275–221 | 55.44% |
| Marshmallon vs Bryan | 281–211 | 57.11% |
| Marshmallon vs King | 285–204 | 58.28% |
| Marshmallon vs Steve | 271–185 | 59.43% |
| Marshmallon vs Law | 253–143 | 63.89% |
| Marshmallon vs Hwoarang | 237–156 | 60.31% |
| Marshmallon vs Reina | 210–172 | 54.97% |
| Marshmallon vs Heihachi | 200–168 | 54.35% |
| Marshmallon vs Lee | 183–128 | 58.84% |
| Marshmallon vs Paul | 156–146 | 51.66% |
| Marshmallon vs Lidia | 166–131 | 55.89% |
| Marshmallon vs Dragunov | 176–118 | 59.86% |
| Marshmallon vs Eddy | 168–102 | 62.22% |
| Marshmallon vs Lars | 135–134 | 50.19% |
| Marshmallon vs Yoshimitsu | 144–107 | 57.37% |
| Marshmallon vs Armor King | 112–139 | 44.62% |
| Marshmallon vs Jun | 128–117 | 52.24% |
| Marshmallon vs Lili | 106–124 | 46.09% |
| Marshmallon vs Feng | 140–86 | 61.95% |
| Marshmallon vs Fahkumram | 113–107 | 51.36% |
| Marshmallon vs Devil Jin | 110–106 | 50.93% |
| Marshmallon vs Asuka | 107–88 | 54.87% |
| Marshmallon vs Nina | 99–96 | 50.77% |
| Marshmallon vs Azucena | 99–90 | 52.38% |
| Marshmallon vs Victor | 110–74 | 59.78% |
| Marshmallon vs Leo | 102–75 | 57.63% |
| Marshmallon vs Xiaoyu | 83–80 | 50.92% |
| Marshmallon vs Jack-8 | 94–65 | 59.12% |
| Marshmallon vs Raven | 84–75 | 52.83% |
| Marshmallon vs Leroy | 97–60 | 61.78% |
| Marshmallon vs Anna | 61–78 | 43.88% |
| Marshmallon vs Claudio | 80–58 | 57.97% |
| Marshmallon vs Clive | 80–48 | 62.50% |
| Marshmallon vs Zafina | 59–57 | 50.86% |
| Marshmallon vs Alisa | 59–46 | 56.19% |
| Marshmallon vs Kuma | 40–44 | 47.62% |
| Marshmallon vs Miary Zo | 45–29 | 60.81% |
| Marshmallon vs Shaheen | 36–37 | 49.32% |
| Marshmallon vs Panda | 21–19 | 52.50% |
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.