The ninjas were arrested in the Kryptarium prison for helping Asphera escape and stealing her scepter from the museum

Even though it was all to save Nya from her aquatic form, they got 5 years in prison... that sucks.

You are an officer who was on guard in the prison yard, there you saw Lloyd about to fight with Ronin and Pythor

Zane: Slow down, Lloyd.. please stay calm–

Pythor: KICK HIS BUTT, RONIN!!

You have to stop them!!