| Cthulu vs Jin | 47–50 | 48.45% |
| Cthulu vs King | 48–38 | 55.81% |
| Cthulu vs Hwoarang | 45–33 | 57.69% |
| Cthulu vs Lars | 46–29 | 61.33% |
| Cthulu vs Law | 50–24 | 67.57% |
| Cthulu vs Feng | 38–33 | 53.52% |
| Cthulu vs Steve | 38–31 | 55.07% |
| Cthulu vs Paul | 41–21 | 66.13% |
| Cthulu vs Reina | 30–30 | 50.00% |
| Cthulu vs Bryan | 24–30 | 44.44% |
| Cthulu vs Dragunov | 24–30 | 44.44% |
| Cthulu vs Xiaoyu | 26–26 | 50.00% |
| Cthulu vs Jun | 39–13 | 75.00% |
| Cthulu vs Lili | 27–24 | 52.94% |
| Cthulu vs Lee | 27–21 | 56.25% |
| Cthulu vs Asuka | 25–20 | 55.56% |
| Cthulu vs Yoshimitsu | 27–17 | 61.36% |
| Cthulu vs Kazuya | 27–15 | 64.29% |
| Cthulu vs Leo | 29–10 | 74.36% |
| Cthulu vs Eddy | 27–10 | 72.97% |
| Cthulu vs Devil Jin | 16–19 | 45.71% |
| Cthulu vs Zafina | 15–19 | 44.12% |
| Cthulu vs Leroy | 10–24 | 29.41% |
| Cthulu vs Heihachi | 11–21 | 34.38% |
| Cthulu vs Raven | 9–22 | 29.03% |
| Cthulu vs Jack-8 | 18–9 | 66.67% |
| Cthulu vs Nina | 13–14 | 48.15% |
| Cthulu vs Claudio | 8–18 | 30.77% |
| Cthulu vs Victor | 12–12 | 50.00% |
| Cthulu vs Alisa | 11–11 | 50.00% |
| Cthulu vs Lidia | 5–13 | 27.78% |
| Cthulu vs Kuma | 7–10 | 41.18% |
| Cthulu vs Azucena | 9–8 | 52.94% |
| Cthulu vs Shaheen | 4–6 | 40.00% |
| Cthulu vs Clive | 4–3 | 57.14% |
| Cthulu vs Panda | 4–2 | 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.