| Gaster vs Clive | 15–33 | 31.25% |
| Gaster vs Reina | 12–21 | 36.36% |
| Gaster vs Steve | 13–18 | 41.94% |
| Gaster vs King | 7–22 | 24.14% |
| Gaster vs Jun | 8–19 | 29.63% |
| Gaster vs Law | 5–20 | 20.00% |
| Gaster vs Jin | 8–16 | 33.33% |
| Gaster vs Kazuya | 5–18 | 21.74% |
| Gaster vs Xiaoyu | 8–10 | 44.44% |
| Gaster vs Nina | 10–8 | 55.56% |
| Gaster vs Lee | 4–13 | 23.53% |
| Gaster vs Dragunov | 2–14 | 12.50% |
| Gaster vs Azucena | 9–7 | 56.25% |
| Gaster vs Bryan | 2–12 | 14.29% |
| Gaster vs Yoshimitsu | 3–10 | 23.08% |
| Gaster vs Lars | 6–7 | 46.15% |
| Gaster vs Heihachi | 7–6 | 53.85% |
| Gaster vs Hwoarang | 6–6 | 50.00% |
| Gaster vs Victor | 2–10 | 16.67% |
| Gaster vs Asuka | 3–8 | 27.27% |
| Gaster vs Lili | 6–4 | 60.00% |
| Gaster vs Zafina | 2–8 | 20.00% |
| Gaster vs Eddy | 2–8 | 20.00% |
| Gaster vs Lidia | 4–6 | 40.00% |
| Gaster vs Kuma | 3–6 | 33.33% |
| Gaster vs Devil Jin | 1–7 | 12.50% |
| Gaster vs Alisa | 0–8 | 0.00% |
| Gaster vs Jack-8 | 0–7 | 0.00% |
| Gaster vs Shaheen | 5–2 | 71.43% |
| Gaster vs Leroy | 3–4 | 42.86% |
| Gaster vs Raven | 4–3 | 57.14% |
| Gaster vs Paul | 0–5 | 0.00% |
| Gaster vs Claudio | 2–3 | 40.00% |
| Gaster vs Leo | 1–3 | 25.00% |
| Gaster vs Feng | 0–2 | 0.00% |
| Gaster vs Panda | 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.