| Stewie vs King | 73–60 | 54.89% |
| Stewie vs Armor King | 41–68 | 37.61% |
| Stewie vs Jin | 45–55 | 45.00% |
| Stewie vs Clive | 34–46 | 42.50% |
| Stewie vs Reina | 31–46 | 40.26% |
| Stewie vs Law | 31–45 | 40.79% |
| Stewie vs Steve | 31–41 | 43.06% |
| Stewie vs Kazuya | 21–43 | 32.81% |
| Stewie vs Hwoarang | 26–30 | 46.43% |
| Stewie vs Eddy | 26–30 | 46.43% |
| Stewie vs Azucena | 19–35 | 35.19% |
| Stewie vs Jun | 21–32 | 39.62% |
| Stewie vs Bryan | 13–33 | 28.26% |
| Stewie vs Miary Zo | 17–29 | 36.96% |
| Stewie vs Lili | 15–28 | 34.88% |
| Stewie vs Dragunov | 15–27 | 35.71% |
| Stewie vs Heihachi | 14–27 | 34.15% |
| Stewie vs Paul | 21–15 | 58.33% |
| Stewie vs Victor | 16–18 | 47.06% |
| Stewie vs Lars | 9–24 | 27.27% |
| Stewie vs Nina | 11–20 | 35.48% |
| Stewie vs Alisa | 9–21 | 30.00% |
| Stewie vs Lee | 11–19 | 36.67% |
| Stewie vs Raven | 11–19 | 36.67% |
| Stewie vs Lidia | 11–16 | 40.74% |
| Stewie vs Fahkumram | 15–12 | 55.56% |
| Stewie vs Leroy | 12–14 | 46.15% |
| Stewie vs Xiaoyu | 14–11 | 56.00% |
| Stewie vs Leo | 9–15 | 37.50% |
| Stewie vs Yoshimitsu | 9–13 | 40.91% |
| Stewie vs Asuka | 11–11 | 50.00% |
| Stewie vs Devil Jin | 10–12 | 45.45% |
| Stewie vs Feng | 6–11 | 35.29% |
| Stewie vs Jack-8 | 3–10 | 23.08% |
| Stewie vs Claudio | 7–5 | 58.33% |
| Stewie vs Anna | 6–5 | 54.55% |
| Stewie vs Zafina | 5–2 | 71.43% |
| Stewie vs Kuma | 1–4 | 20.00% |
| Stewie vs Shaheen | 3–1 | 75.00% |
| Stewie vs Panda | 1–3 | 25.00% |
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.