| Regulus Rex vs Kazuya | 51–42 | 54.84% |
| Regulus Rex vs King | 34–44 | 43.59% |
| Regulus Rex vs Jin | 36–40 | 47.37% |
| Regulus Rex vs Bryan | 34–22 | 60.71% |
| Regulus Rex vs Hwoarang | 30–25 | 54.55% |
| Regulus Rex vs Nina | 28–26 | 51.85% |
| Regulus Rex vs Armor King | 25–28 | 47.17% |
| Regulus Rex vs Heihachi | 28–22 | 56.00% |
| Regulus Rex vs Paul | 19–29 | 39.58% |
| Regulus Rex vs Law | 19–25 | 43.18% |
| Regulus Rex vs Reina | 21–22 | 48.84% |
| Regulus Rex vs Lili | 18–21 | 46.15% |
| Regulus Rex vs Anna | 19–20 | 48.72% |
| Regulus Rex vs Clive | 22–16 | 57.89% |
| Regulus Rex vs Dragunov | 15–19 | 44.12% |
| Regulus Rex vs Azucena | 17–17 | 50.00% |
| Regulus Rex vs Victor | 14–20 | 41.18% |
| Regulus Rex vs Steve | 12–18 | 40.00% |
| Regulus Rex vs Leo | 15–15 | 50.00% |
| Regulus Rex vs Devil Jin | 15–14 | 51.72% |
| Regulus Rex vs Jun | 16–12 | 57.14% |
| Regulus Rex vs Alisa | 9–16 | 36.00% |
| Regulus Rex vs Yoshimitsu | 5–16 | 23.81% |
| Regulus Rex vs Lars | 13–8 | 61.90% |
| Regulus Rex vs Feng | 13–5 | 72.22% |
| Regulus Rex vs Zafina | 11–7 | 61.11% |
| Regulus Rex vs Lidia | 9–9 | 50.00% |
| Regulus Rex vs Asuka | 10–6 | 62.50% |
| Regulus Rex vs Claudio | 8–8 | 50.00% |
| Regulus Rex vs Eddy | 11–5 | 68.75% |
| Regulus Rex vs Panda | 9–6 | 60.00% |
| Regulus Rex vs Fahkumram | 5–9 | 35.71% |
| Regulus Rex vs Miary Zo | 4–10 | 28.57% |
| Regulus Rex vs Leroy | 4–8 | 33.33% |
| Regulus Rex vs Xiaoyu | 4–7 | 36.36% |
| Regulus Rex vs Jack-8 | 3–7 | 30.00% |
| Regulus Rex vs Lee | 3–7 | 30.00% |
| Regulus Rex vs Kuma | 2–3 | 40.00% |
| Regulus Rex vs Shaheen | 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.