Bracket one: Materia stealing
Bracket two: Jail Time
Bracket three: Lightning mini game. Like, moms are tough is the smurfing worst but I failed that stupid lightning mini game just 3 short of completing it and 14 or so years on I've never forgotten or forgiven.
Bracket four: go talk to a wall!

Also good job the spin offs aren't allowed. I've started playing World of Final Fantasy and the awful writing combined with some terrible voice acting is just like one long cringe compilation.