I thought of the 1990s Power Rangers several times throughout the episode. The intro at Shokanabo's lair reminded me of when on Power Rangers they show the villians at their lair plotting against the Rangers. Then when the turtles couldn't defeat Shokanabo, Cody arrived in his mech, kind of like how the Rangers have their Zords.
Also, the end when Shokanabo is making the Dark Turtles. Sort of like how Finster used to create those clay bad guys in Power Rangers. Ok maybe not....
One more thing, Shokanabo has somewhat of Goldar's face.