| Gammamon vs Kazuya | 19–0 | 100.00% |
| Gammamon vs King | 16–0 | 100.00% |
| Gammamon vs Jin | 13–1 | 92.86% |
| Gammamon vs Steve | 13–0 | 100.00% |
| Gammamon vs Lili | 13–0 | 100.00% |
| Gammamon vs Asuka | 9–1 | 90.00% |
| Gammamon vs Victor | 10–0 | 100.00% |
| Gammamon vs Law | 9–0 | 100.00% |
| Gammamon vs Yoshimitsu | 9–0 | 100.00% |
| Gammamon vs Jun | 9–0 | 100.00% |
| Gammamon vs Alisa | 6–2 | 75.00% |
| Gammamon vs Nina | 8–0 | 100.00% |
| Gammamon vs Reina | 8–0 | 100.00% |
| Gammamon vs Lee | 6–0 | 100.00% |
| Gammamon vs Azucena | 6–0 | 100.00% |
| Gammamon vs Jack-8 | 5–0 | 100.00% |
| Gammamon vs Lars | 5–0 | 100.00% |
| Gammamon vs Hwoarang | 4–0 | 100.00% |
| Gammamon vs Bryan | 4–0 | 100.00% |
| Gammamon vs Feng | 4–0 | 100.00% |
| Gammamon vs Leo | 4–0 | 100.00% |
| Gammamon vs Xiaoyu | 3–0 | 100.00% |
| Gammamon vs Dragunov | 3–0 | 100.00% |
| Gammamon vs Claudio | 3–0 | 100.00% |
| Gammamon vs Leroy | 3–0 | 100.00% |
| Gammamon vs Paul | 2–0 | 100.00% |
| Gammamon vs Devil Jin | 2–0 | 100.00% |
| Gammamon vs Raven | 2–0 | 100.00% |
| Gammamon vs Clive | 2–0 | 100.00% |
| Gammamon vs Anna | 2–0 | 100.00% |
| Gammamon vs Eddy | 1–0 | 100.00% |
| Gammamon vs Lidia | 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.