To get the now-childlike Mona onto their team officially, G-Wrench and the team visit league registration. It's revealed that Mona can use a Fight Burst, but doesn't remember how to do it. As Kara's suspicions grow, Professor Pi's team Q.E.D. challenges them to a match.
Then I dunno!
!إذًا لا أعلم
Dann weiß ich’s nicht.
Entonces no sé.
Entonces, no sé.
Alors, je sais pas !
Allora non lo so!
Então sei lá!
Тогда не знаю!