| Cthulhu vs Dragunov | 6–6 | 50.00% |
| Cthulhu vs Law | 4–6 | 40.00% |
| Cthulhu vs Reina | 6–4 | 60.00% |
| Cthulhu vs Steve | 4–5 | 44.44% |
| Cthulhu vs King | 5–3 | 62.50% |
| Cthulhu vs Jin | 3–5 | 37.50% |
| Cthulhu vs Bryan | 2–5 | 28.57% |
| Cthulhu vs Lili | 4–2 | 66.67% |
| Cthulhu vs Clive | 4–2 | 66.67% |
| Cthulhu vs Jun | 0–4 | 0.00% |
| Cthulhu vs Victor | 3–1 | 75.00% |
| Cthulhu vs Paul | 1–2 | 33.33% |
| Cthulhu vs Hwoarang | 1–2 | 33.33% |
| Cthulhu vs Asuka | 2–1 | 66.67% |
| Cthulhu vs Azucena | 2–1 | 66.67% |
| Cthulhu vs Eddy | 2–1 | 66.67% |
| Cthulhu vs Fahkumram | 2–1 | 66.67% |
| Cthulhu vs Yoshimitsu | 2–0 | 100.00% |
| Cthulhu vs Kazuya | 1–1 | 50.00% |
| Cthulhu vs Jack-8 | 2–0 | 100.00% |
| Cthulhu vs Devil Jin | 2–0 | 100.00% |
| Cthulhu vs Lars | 0–2 | 0.00% |
| Cthulhu vs Leroy | 2–0 | 100.00% |
| Cthulhu vs Lee | 1–0 | 100.00% |
| Cthulhu vs Heihachi | 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.