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Big Ben is a colossal amalgamation that stands in an upright posture. His face has 4 eyes and 2 head plates that separate to reveal a massive pink brain. His lower jaw splits in half to reveal a green interior with a set of sharp teeth on both sides. A tail extends off Big Ben's head.
His shoulders are green, each one housing a large mouth with blunt teeth. The torso of Big Ben is composed of a blueish gray slime with Xolbrine organs and a Galvan arm with an eye on it. The right arm of Big Ben resembles a skinless Ectonurite's with bone spikes jutting from the elbow.
The Modified Omnitrix Symbol is on his chest, with Technus' face on the emblem.
- In Chapter 10: Again, Big Ben is formed through Technus combining all the available Alternative Ben Tennysons under his control. After being recalled through a portal to the Temporal Zone by Divinity, he faces down Ben Tennyson, Danny Fenton and Future Fenton.
- Chapter 10: Again (first appearance)