| Cthulu vs Jin | 51–52 | 49.51% |
| Cthulu vs King | 52–39 | 57.14% |
| Cthulu vs Hwoarang | 48–41 | 53.93% |
| Cthulu vs Steve | 46–38 | 54.76% |
| Cthulu vs Feng | 48–33 | 59.26% |
| Cthulu vs Law | 52–27 | 65.82% |
| Cthulu vs Lars | 50–29 | 63.29% |
| Cthulu vs Kazuya | 45–26 | 63.38% |
| Cthulu vs Reina | 34–35 | 49.28% |
| Cthulu vs Bryan | 33–34 | 49.25% |
| Cthulu vs Paul | 41–24 | 63.08% |
| Cthulu vs Dragunov | 26–30 | 46.43% |
| Cthulu vs Lili | 29–26 | 52.73% |
| Cthulu vs Asuka | 33–21 | 61.11% |
| Cthulu vs Xiaoyu | 26–26 | 50.00% |
| Cthulu vs Jun | 39–13 | 75.00% |
| Cthulu vs Lee | 29–21 | 58.00% |
| Cthulu vs Yoshimitsu | 28–17 | 62.22% |
| Cthulu vs Eddy | 32–12 | 72.73% |
| Cthulu vs Leo | 29–10 | 74.36% |
| Cthulu vs Leroy | 12–27 | 30.77% |
| Cthulu vs Heihachi | 16–23 | 41.03% |
| Cthulu vs Devil Jin | 19–19 | 50.00% |
| Cthulu vs Jack-8 | 24–10 | 70.59% |
| Cthulu vs Zafina | 15–19 | 44.12% |
| Cthulu vs Raven | 10–24 | 29.41% |
| Cthulu vs Nina | 15–18 | 45.45% |
| Cthulu vs Alisa | 16–11 | 59.26% |
| Cthulu vs Azucena | 16–11 | 59.26% |
| Cthulu vs Claudio | 8–18 | 30.77% |
| Cthulu vs Victor | 13–12 | 52.00% |
| Cthulu vs Lidia | 6–14 | 30.00% |
| Cthulu vs Kuma | 7–10 | 41.18% |
| Cthulu vs Shaheen | 4–6 | 40.00% |
| Cthulu vs Clive | 6–3 | 66.67% |
| Cthulu vs Armor King | 6–3 | 66.67% |
| Cthulu vs Miary Zo | 7–2 | 77.78% |
| Cthulu vs Panda | 4–2 | 66.67% |
| Cthulu vs Anna | 2–1 | 66.67% |
| Cthulu vs Fahkumram | 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.