The "Big Book of Pokkén Tournament Frame Data" has been around since the game released for Wii U in March of 2016. The spreadsheet details every single move for every single character in Pokkén, giving players a way to quickly find out what moves can punish a blocked attack, what moves are safe when blocked, and more. Because of this, the document has been extremely important when it comes to Pokkén's competitive growth.
Recent findings by Milln - a long-time member of the FGC and a leader in the Pokkén community - show that there are fundamental errors to this frame data, however. As Milln points out in the "Proof of Concept" video below, all of Pokkén's frame data appears to be incorrect by 2 frames.
Milln's video suggests that all attacks in Pokkén Tournament actually make impact 2 frames later than the spreadsheet suggests. In the video, he shows that 9-frame attacks - Pokkén's fastest grounded attacks - are actually 11 frames. This extends to all attacks, meaning every move in the spreadsheet is likely listed as 2 frames less than it should be. Milln has begun reviewing all of Pokkén's frame data, planning to have completed review by January 1, 2018.
While this is very surprising news for competitive players, it is in no way a cause for anger or panic. As these findings affect all of Pokkén's frame data, the relationships between moves will not change. 11-frame moves are still the fastest grounded attacks in Pokkén - just as they were when we considered them 9-frames - and your options for punishing a blocked attack are still the same. The reason this is important is not so much the effect it will have on how we play the game, but rather the effect on how we discuss the game. A lot of old frame data discussion is now incorrect as a result of Milln's discovery, but saying you can punish a blocked Psystrike with Lucario's 2Y is still correct as the relative frame data between the two moves is still the same. This discovery is important for labbing and discussion going forward as the community will have to learn to use the new, more accurate frame data in the future.
We will bring you more on this discovery as it comes.