| Grumpy Grandpa vs Reina | 36–12 | 75.00% |
| Grumpy Grandpa vs Kazuya | 30–17 | 63.83% |
| Grumpy Grandpa vs Jin | 30–16 | 65.22% |
| Grumpy Grandpa vs King | 25–20 | 55.56% |
| Grumpy Grandpa vs Steve | 22–18 | 55.00% |
| Grumpy Grandpa vs Paul | 23–12 | 65.71% |
| Grumpy Grandpa vs Bryan | 20–14 | 58.82% |
| Grumpy Grandpa vs Lili | 19–12 | 61.29% |
| Grumpy Grandpa vs Azucena | 15–13 | 53.57% |
| Grumpy Grandpa vs Lars | 14–12 | 53.85% |
| Grumpy Grandpa vs Lee | 20–6 | 76.92% |
| Grumpy Grandpa vs Lidia | 17–9 | 65.38% |
| Grumpy Grandpa vs Nina | 13–12 | 52.00% |
| Grumpy Grandpa vs Law | 16–8 | 66.67% |
| Grumpy Grandpa vs Dragunov | 19–5 | 79.17% |
| Grumpy Grandpa vs Heihachi | 18–6 | 75.00% |
| Grumpy Grandpa vs Victor | 10–13 | 43.48% |
| Grumpy Grandpa vs Hwoarang | 9–12 | 42.86% |
| Grumpy Grandpa vs Leo | 11–9 | 55.00% |
| Grumpy Grandpa vs Devil Jin | 10–9 | 52.63% |
| Grumpy Grandpa vs Yoshimitsu | 9–6 | 60.00% |
| Grumpy Grandpa vs Jack-8 | 4–10 | 28.57% |
| Grumpy Grandpa vs Asuka | 4–10 | 28.57% |
| Grumpy Grandpa vs Kuma | 3–11 | 21.43% |
| Grumpy Grandpa vs Zafina | 8–6 | 57.14% |
| Grumpy Grandpa vs Feng | 8–5 | 61.54% |
| Grumpy Grandpa vs Jun | 4–9 | 30.77% |
| Grumpy Grandpa vs Raven | 7–6 | 53.85% |
| Grumpy Grandpa vs Eddy | 4–9 | 30.77% |
| Grumpy Grandpa vs Xiaoyu | 5–6 | 45.45% |
| Grumpy Grandpa vs Shaheen | 5–5 | 50.00% |
| Grumpy Grandpa vs Claudio | 6–3 | 66.67% |
| Grumpy Grandpa vs Alisa | 5–3 | 62.50% |
| Grumpy Grandpa vs Leroy | 5–2 | 71.43% |
| Grumpy Grandpa vs Clive | 3–2 | 60.00% |
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.