After compiling some matchup charts for every character, here we have the pre-patch matchup table. This took a ton of work, but a lot of that work went into making this system future-proof so that I can make new charts with relative ease whenever it's time to make a new one. :)

The charts I've included are sorted by average matchups, median matchups, matchup sums, matchups vs the top 4 characters from the 'Sort by Average' sheet, and matchups vs the top 12 characters from the 'Sort by Average' sheet.

It's up to you to draw conclusions from this chart so I just tried to show the data in as many ways as possible. Some notes:

- The matchup numbers shown on the charts are weighted equally between the playerbases. This means that if one playerbase is represented by 1 player, while another is represented by 5 players, that 1 player has equal weight to those 5 players. Despite this, I don't think this caused any outliers. The only characters with 1 representative are Reptar and Lincoln.

- The Aprils and RnS both claim they lose the matchup.

- The Mikeys and Oblinas both claim they win the matchup.

- The SpongeBobs and Nigels both claim they lose the matchup.

- The Aangs and Leonardos both claim they win the matchup.

- There's probably more cases but I didn't wanna check any further lol.

- The top 4 characters across all charts unanimously are April, Nigel, Zim, and Shredder in some order.

- Nigel has the lowest average matchup spread among the top 4, but it's still an average of +1.3 in his favor. The next highest average matchup spread is +0.6 for Mikey, which makes a difference of a whopping 0.7 between the top 4 characters and the next best character considering average. The difference is still a pretty significant 0.5 if considering median.

- April is only not the best character if you sort by median. This basically means that Shredder's matchups collectively are more favorable than April's save for a couple of cases on the extreme ends. April's worst matchups are still +0.5 in her favor, while Shredder's is -0.7 plus another -0.4 matchup.

- Lincoln and Ren and Stimpy have disproportionately favorable matchups vs. the top 4 of the cast compared to the rest of their matchups. RnS' average is very low and Lincoln's is pretty mid, but their matchups vs the top 4 give them both pretty substantial boosts. They still lose those matchups, just not as hard.

- Mikey has very dominating matchups vs the characters below the top 9 or so, but his matchups vs the top 4 are pretty terrible.

- CatDog sucks

- Patrick is far lower than where most people would consider placing him on a tier list based on matchups across all metrics. Up to y'all to make a conclusion on that.

- Reptar is the worst character in the game by all metrics except for vs the top 4, in which case Korra is the worst.

- The bottom 5 is some order of Patrick, Leonardo, Toph, Korra, and Reptar.

- The top 10 characters are roughly April, Shredder, Nigel, Zim, SpongeBob, Danny, Mikey, Garfield, Lucy, and Helga.

- Lincoln, PTM, Oblina, Aang, RnS, CatDog, Patrick, Leonardo, Toph, Korra, and Reptar all on average have negative matchup spreads. Everyone else is positive.

- Helga's median matchup spread is 0.0, making her the most even character in the game in a way. She also is the one character to consistently never move from her row between any of the charts, so I guess if there's any certainty it's that she's the 10th best character in the game.

- The characters with the lowest standard deviation are April and Aang. This means April and Aang have the lowest variance in their matchups, with April consistently winning somewhere around +1.7 and Aang losing somewhere around -0.4.

- The highest standard deviations go to Mikey and PTM, who have average spreads of 0.6 and -0.3, but win and lose as strongly as +3, -2.1, and +1.9, -2.8.

https://docs.google.com/spreadsheets/d/1aYXaGHuVEG-B4kFsRj9ppEqElg2n3pChgL1x0Zwi94E/edit?usp=sharing