| Marth vs King | 55–44 | 55.56% |
| Marth vs Kazuya | 48–48 | 50.00% |
| Marth vs Jin | 41–41 | 50.00% |
| Marth vs Steve | 31–36 | 46.27% |
| Marth vs Reina | 33–31 | 51.56% |
| Marth vs Lidia | 31–33 | 48.44% |
| Marth vs Jun | 24–29 | 45.28% |
| Marth vs Victor | 29–22 | 56.86% |
| Marth vs Hwoarang | 24–26 | 48.00% |
| Marth vs Paul | 25–20 | 55.56% |
| Marth vs Bryan | 20–24 | 45.45% |
| Marth vs Law | 21–22 | 48.84% |
| Marth vs Lili | 24–15 | 61.54% |
| Marth vs Asuka | 17–20 | 45.95% |
| Marth vs Eddy | 21–15 | 58.33% |
| Marth vs Heihachi | 20–13 | 60.61% |
| Marth vs Yoshimitsu | 15–14 | 51.72% |
| Marth vs Lee | 15–13 | 53.57% |
| Marth vs Lars | 11–16 | 40.74% |
| Marth vs Xiaoyu | 8–15 | 34.78% |
| Marth vs Leo | 14–8 | 63.64% |
| Marth vs Alisa | 12–9 | 57.14% |
| Marth vs Leroy | 15–6 | 71.43% |
| Marth vs Devil Jin | 8–12 | 40.00% |
| Marth vs Dragunov | 8–11 | 42.11% |
| Marth vs Nina | 13–6 | 68.42% |
| Marth vs Raven | 12–6 | 66.67% |
| Marth vs Feng | 10–6 | 62.50% |
| Marth vs Jack-8 | 5–10 | 33.33% |
| Marth vs Kuma | 5–8 | 38.46% |
| Marth vs Clive | 10–3 | 76.92% |
| Marth vs Azucena | 5–6 | 45.45% |
| Marth vs Shaheen | 7–3 | 70.00% |
| Marth vs Claudio | 4–5 | 44.44% |
| Marth vs Panda | 4–2 | 66.67% |
| Marth vs Anna | 6–0 | 100.00% |
| Marth vs Zafina | 2–1 | 66.67% |
| Marth vs Miary Zo | 1–2 | 33.33% |
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.