Fighting games are notoriously difficult to balance, as the extraordinarily technical nature of the gameplay can lead to certain methods simply being more effective than others. Playtesting helps greatly in this regard, but nothing can quite replicate the phenomenon of the full public having access, and cracks in the gameplay inevitably show up. This has now happened for Pokkén Tournament, and a new combo has been discovered that's impossible to beat.
The combo is pulled off by Shadow Mewtwo, and it involves a simple, two-move setup. Basically, if the opponent tries to block the first attack, they can be trapped in the block state indefinitely and have their health chipped down. When the match ends, Shadow Mewtwo wins by default. Check out this video which explains it and shows how it's done, though do be warned, there is some strong language:
What do you think? Have you come across this yet? Do you think it'll be patched? Share your thoughts in the comments below.