Complex sentence: Ultimate Alien, the Ultimatrix enables Humongousaur to evolve into larger Ultimate Humongousaur, now with huge spikes on his back, head, and arms, along with a dark blue, spiked helmet on his head.
Split into simpler sentences: Ultimate Alien, the Ultimatrix enables Humongousaur to evolve into Ultimate Humongousaur. He now has huge spikes on his back, head, and arms, along with a dark blue, spiked helmet on his head.