At an unknown point in time, Chris and Martin were among the students taken under Yang's teachings, with Yang becoming infamous for his strict methods on him. However, when Yang tried to use the Yin Blade on himself, he accidentally cursed the Temple of Airjitzu, transforming himself and his students into ghosts. Yang later used the Yin Blade to enslave them to his will.
As the morning came and the curse on Yang's Temple started to take effect on the ninja, Yang showed himself, revealing Chris, Martin, and the other students to be chained up, as they were imprisoned by Yang. The ninja then quickly fled to the entrance, not wanting to suffer the same fate.
After Yang's temple was torn from Ninjago to help construct Djinjago, Chris and Martin left Yang's temple while Yang angrily confronted Nadakhan, claiming domain. However, Nadakhan was unimpressed and promptly ordered Dogshank to shoot water at the students, forcing them to abandon the temple.
With Cole restrained, Yang has his students watched Yang open the Rift of Return. However, Cole attacked the students and went after Yang. The students went outside to watch and jumped through once the portal opened to become mortal again.
- 61. "Wishmasters"
- The two share the names of the Kratt brothers.