| Dyffryn vs Kazuya | 62–40 | 60.78% |
| Dyffryn vs Heihachi | 36–39 | 48.00% |
| Dyffryn vs Clive | 36–25 | 59.02% |
| Dyffryn vs Bryan | 30–30 | 50.00% |
| Dyffryn vs King | 28–30 | 48.28% |
| Dyffryn vs Reina | 30–26 | 53.57% |
| Dyffryn vs Lili | 26–28 | 48.15% |
| Dyffryn vs Jin | 28–25 | 52.83% |
| Dyffryn vs Hwoarang | 18–25 | 41.86% |
| Dyffryn vs Yoshimitsu | 25–16 | 60.98% |
| Dyffryn vs Steve | 24–16 | 60.00% |
| Dyffryn vs Dragunov | 14–25 | 35.90% |
| Dyffryn vs Paul | 15–14 | 51.72% |
| Dyffryn vs Law | 15–12 | 55.56% |
| Dyffryn vs Leo | 14–13 | 51.85% |
| Dyffryn vs Lee | 8–19 | 29.63% |
| Dyffryn vs Azucena | 11–15 | 42.31% |
| Dyffryn vs Feng | 12–13 | 48.00% |
| Dyffryn vs Jun | 12–12 | 50.00% |
| Dyffryn vs Devil Jin | 12–10 | 54.55% |
| Dyffryn vs Xiaoyu | 13–8 | 61.90% |
| Dyffryn vs Lars | 9–12 | 42.86% |
| Dyffryn vs Jack-8 | 9–11 | 45.00% |
| Dyffryn vs Asuka | 13–7 | 65.00% |
| Dyffryn vs Victor | 8–12 | 40.00% |
| Dyffryn vs Nina | 9–8 | 52.94% |
| Dyffryn vs Alisa | 7–9 | 43.75% |
| Dyffryn vs Claudio | 8–7 | 53.33% |
| Dyffryn vs Leroy | 6–9 | 40.00% |
| Dyffryn vs Eddy | 7–6 | 53.85% |
| Dyffryn vs Kuma | 6–5 | 54.55% |
| Dyffryn vs Lidia | 3–6 | 33.33% |
| Dyffryn vs Raven | 1–5 | 16.67% |
| Dyffryn vs Zafina | 0–5 | 0.00% |
| Dyffryn vs Shaheen | 1–2 | 33.33% |
| Dyffryn vs Panda | 2–1 | 66.67% |
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.