This move exists primarily within the Sonic X continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
The Egg Ninja Art: 16 Tons (エッグ忍法・16トン,Eggu ninpō 16-ton?) is a move that appears in the anime series Sonic X. It is one of the many ninja techniques utilized by E-91 Lady Ninja.
When performing Egg Ninja Art: 16 Tons, Lady Ninja increases the size and mass of the weight on her kusari-fundo-based weapon, reaching 16 tons. When using the transformed weapon as a flail, it has highly destructive power, being able to smash through concrete.
Chaos Emerald Saga
When engaging Knuckles the Echidna in a subway, Lady Ninja used Egg Ninja Art: 16 Tons to fight him. However, her reckless usage of the technique caused the tunnel to cave in on her.