As Sonic and the gang rushed into the final room, there stood the mad scientist accompanied by Nightmare Moon.
"Alright Baldy Nosehair! I'm giving you one last warning. Give up and go back to our world or watch as we wreck another one of your dumb plans!" Sonic said.
Nightmare Moon grinned. "You little fools. Dr. Eggman has one last trick up his sleeve that will surely turn that confident smile into a terrified frown!"
Pinkie frowned. "And what kind of trick is that?" she asked.
Eggman smirked. "Turning your own friends into my living batteries!" he exclaimed before thrusting forward a lever on his mobile.
Nightmare Moon used her magic to project a realistic void that seemed to expand forever, replacing the roof but leaving the floor. From the huge gaping hole in the floor rose different purple sections of titanium, steel, and polymer alloy. Eggman positioned his mobile high above the room before the sections of metal began to snap together like a toy with replaceable parts.
Sonic and the girls stepped backwards in uneasiness.
"O-oh my…" Fluttershy whimpered as she shrunk down to the floor, shaking violently with fright.
Applejack stared with eyes widened. "Woah nelly…"
Pinkie's jaw dropped. "Holy Cupcakes!"
Eggman's giant mech was literally putting itself together. The top of the mech had 3 sharp points like a crown and seemed to resemble another one of Eggman's mechs from an earlier point in time which involved a interstellar amusement park. The bottom was a separate segment which had a large hole in the middle. The body was complete but now needed the extra parts.
From underneath the 6 ponies rose spherical golden containers which sealed the ponies inside before flying off to combine with the nearly completed mech. Sonic could hear muffled screams and cries for help coming from the 6 containers
5 golden beams expanded from the back of the mech and began to join together. Inside the containers, Twilight and the girls were forcibly restrained by metallic cuffs which tightly clamped onto each hoof. They also began sending signals through the ponies' bodies, reading their life force, energy levels, and who they were. Twilight's capsule was joined into the center of the mech before 2 rods expanded outwards. The rest of the girls were attached to the 5 rods on the back.
Eggman cackled. "Behold Sonic! My ultimate weapon of your destruction! The Egg Shrine!" he exclaimed.
Sonic glared with uneasiness as the mech roared to life, draining Twilight of her magic as the two rods expelled it to form arms which faded from magical energy to solid physical appendages.
The mad scientist programmed the finishing commands and scripts into the mech's computer, laughing. "Not so hopeful anymore are we? You know what Sonic, I'll let you decide what to do. Will you give me the Chaos Emeralds and spare your friends or will you sacrifice them and have a better chance of succeeding?" he questioned.
Sonic frowned, noticing the Chaos Emeralds on the floor where the girls once stood before turning to Twilight's capsule. Inside, the purple unicorn stared right back through the transparent mega glass with a grim but confident expression. "Don't worry about us Sonic. Use the emeralds and stop Eggman once and for all. W-We'll be alright…" she assured before both she and the rest of the girls hung their heads in dread and understanding. If it meant saving Equestria, death would be a sure option…
Eggman grinned. "Tick tock Sonic! This machine will lock into whatever energy it has any minute now. What's your answer?" he asked.
Sonic thought long and hard.
Friends
Emeralds
Sonic sighed. "I choose...the Chaos Emeralds." he announced.
Eggman grinned before pulling a lever and locking the capsules into place. Suddenly they began to form a circle made from electricity! The girls inside screamed in agony as they began to feel their energy being drained from their bodies.
Sonic frowned as he began to tap into the Chaos Emeralds' powers. "Don't worry girls! I'll figure something out!" he said as the emeralds began to spin around him, quickly picking up speed. Sonic closed his eyes as he began concentrating, channeling the energy from the emeralds. A bright light began to radiate from his body as he felt a familiar power surge through his body. His quills became sharper and turned a shining golden color. Sonic's eyes turned red as he began to rise along with the emeralds when suddenly…
*BOOM*
Sonic was suspended in air as he radiated a golden aura. Sonic had transformed into
Super Sonic! "Time to finish this once and for all!" he shouted before flying into the final showdown with Eggman and the Elements of Harmony!