I couldn't finish 'em. Looks like this's gonna get complicated.
Gataeu Shockalots, much like Electric Flan, absorb lightning and resist physical attacks. Like all flan, they lunge at their opponents and there is a Killsight chance when dodging the lunging flan, and then hitting them right after.
Because flan resist physical damage, only the strongest cadets, Cinque and Jack, are likely to do any decent damage with normal attacks. Magic (outside of Thunder magic) works well and will likely kill the flan in one hit. Approaching them and enticing them to lunge and then dodging to open the Killsight chance is also a quick way to deal with them.
Gateau is French for "cake".