Wow, I can't believe I've reached up to twenty chapters in my story!

Enjoy! ;)

(PS: thank you for the 58 reviews! I'm about to reach 60 reviews sooner!)

Chapter 20: Heavy Metal Mecha-Bowser

"She's waiting for you both at the Toy Time Galaxy, one of the available galaxies from the Engine Room." Rosalina told the heroes where the next friend of Sonic was.

"Got it. Let's go, Mario!" Sonic exclaimed. He and Mario made their way up to the Engine Room.

This place had walls and ceiling made of steel, iron grating on the floor with a orange circle at the middle and the walls had purple, blue and red pipes sticking out and into towards the ceiling. There was also a wandering robot called a Gearmo going in circles slowly around the room.

The heroes used the Pull Star at the room's center, and a Launch Star sent them to Toy Time Galaxy.

Toy Time Galaxy was basically a children's toy wonderland; giant toys and platforms made of wood. This galaxy also featured conveyer belts, gears, a pixilated Mario, giant spoons, forks and pencils. There was also a huge cake at the bottom.

The heroes landed on a blue-painted wooden platform. At the corner was a Gearmo. The heroes went to him.

"Welcome to the Toy Time Galaxy! We Gearmos are in charge of upkeep and maintenance here." The Gearmo said.

Up ahead there were two toy trains going in circles, making their 'choo choo!' noises, with steam coming out of their chimneys. Captain Toad was on one of them, enjoying the ride.

"Wheeeeeeeeeee!" he cheered.

The heroes stood on top of the most nearby train, and rode it until it reaches the Launch Star.

After flying through a giant wooden gear, they landed on a planet that looked like a small factory of some sorts, moved by giant red and yellow strings underneath them. There were tons of screws and walls of gravity.

After defeating a Mecha-Koopa, they came upon another Gearmo, but that one was freaking out.

"My friends have been kidnapped! Alongside that poor bunny rabbit!" the Gearmo panicked.

"Is he talking about one of my friends?" Sonic said in his thoughts.

They made their way to a platform below, and on the blue one was a golden screw.

"I bet I can unscrew it with my spin." Mario guessed.

He jumps on the screw and spins to unscrew it. They go through the hole that remained, and there was an unscrewed blue screw. Mario spins on it to screw it back, and eventually, a bridge appeared leading them to a wall of gravity.

They used the gravity wall to reach another side. Upon avoiding a Sentry Beam, they went on the walls again. There was a spinning platform with another blue screw. Mario screws it back, causing the platform to stop spinning, making colorful Star Bits appear. He then unscrews a gold screw up ahead, and the path to the Launch Star opened.

The next area was a bunch of arranged colorful blocks and some conveyer belts. They first defeated another Mecha-Koopa, and up ahead was another question mark coin.

"There's another question mark coin-a! Let's-a see what it triggers now." Mario said and they touched the coin, making the same curious sound, and eventually, a grey mushroom with a spring texture on its cap showed up.

"Whoa! Why does this mushroom look so strange?" Sonic asked, looking at the Spring Mushroom.

"Its cap looks like a squashed spring… I wonder if it's a spring Power-Up?" Mario wondered.

"Only one way to find out."

They reached their hands to touch the Spring Mushroom. A sparkle of white light surrounded them. Once it disappears in a flash, this is how Mario and Sonic ended up:

Nothing really changed for Mario by his clothing, except he got a huge spring wrapped around his body, which made him very uncomfortable.

Sonic, however, got a Shoe Upgrade like in his Adventure games; the upper part of his shoes, soles and heels got some steel parts, making it look like boots. On the heels' soles were small red springs (it's like the item from Sonic Chaos).

Mario was now Spring Mario and Sonic was Spring Sonic (yeah…sort of).

"Cool! It's like I got a Shoe Upgrade!" Spring Sonic exclaimed, looking at his new shoes.

"Yeah…but…what…about…a…me?!" Spring Mario complained; because he couldn't stop bouncing, he wasn't able to speak normally.

"Oh, chill out, Mario. Once we get out of this place, the Power-Up should go away." Spring Sonic rolled his eyes. "Besides, just like you, I will only be able to move by jumping anyways, because I can't walk in these shoes."

"If…you…say…so…" Spring Mario said.

They started to bounce forward. Spring Mario was flipping over and over when he moves, making him feel a bit woozy. They reached a very tall platform in which they had to use all their strength by pressing their bodies down on the ground to give pressure to their springs, and taking to the skies.

"YAHOOO!" Spring Sonic cheered.

Upon landing, the spring heroes continued bouncing forward, passing by some more conveyer belts and doing more high jumps, reaching the top of a block tower, where a Launch Star awaits. As soon as Mario and Sonic got inside the Launch Star, their Spring Power-Ups wore off.

They landed on a grey wooden platform that was connecting an aqua-green wooden cube by a black wooden path. Carved in the aqua-green wooden cube was a giant screw.

"Phew! I can finally speak normally now since that-a giant spring is gone." Mario sighed in relief.

"Well, I kinda enjoyed that Shoe Upgrade for me. But it's just too boring to keep jumping to move; I'd rather prefer running."Sonic commented.

"You have a point there. Let's keep going."

They began their search on the wooden platform they were on; there was a Star Chip above a Sentry Beam on the wooden gear carved on the platform. After taking the first Chip, and passing by the black wooden path that had electrifying spinning black balls, they found the other Star Chip above an orange spring.

The remaining Star Chips were on the cube and on the giant screw. They found the third Chip by breaking a glass crystal. For the fourth and fifth Chips, which they both were at the screw, they had to lower the screw's pointy end. Mario went to the giant screw's head, where there was a Star Chip and a blue screw. He screws it back, and eventually, the giant screw screws down, and the heroes were able to climb its pointy end to reach the last Star Chip.

The five Star Chips created a Launch Star, and the heroes use it.

Their next destination was a giant plate with a spoon and a fork leaning against an empty bottle with a Launch Star inside of it. The bottle's cap was too high to reach, so the heroes needed the Spring Mushroom again, which was on the spoon. They used their high jumps, and ground-pounded the bottle's cap, which was a rock, and went inside the Launch Star.

They finally reached the giant Mecha-Bowser robot, where it was keeping the Gearmos and a cream-colored mobian rabbit, which was panicking and screaming for help.

The heroes landed on the large conveyer belt leading straight to the robot's feet.

"God almighty! How are we going to beat that giant robot?!" Sonic gasped.

"Let's start by climbing on his feet!" Mario suggested. "I'll take the left one and you'll take the right one!"

They nodded and split up. Mario climbed on the left ankle, where there was a blue screw at its knee. He screws it and goes to the orange pipe at the robot's thigh. With Sonic, he found a blue screw at its right thigh. He spins dash on it to screw it, and a Sling Star showed up above his head. Mario arrived just in time where Sonic was, and both used the Sling Star.

The Sling Star sent them to the robot's right part of its torso. There were four gold screws on it; the heroes used their abilities to unscrew them all, and the plate opens up, revealing two gaps underneath it. There was a green Warp Pipe on one of them. The heroes go down the pipe.

The pipe took them to an upper platform bridge, leading them to the robot's left opened claw, which had walls of gravity. They ventured on its left arm, and once they reached its shoulder, Mario unscrews the gold screw on it, and a Launch Star showed up as the left arm was falling. The heroes quickly used the Launch Star.

The Launch Star sends them to a bridge platform leading to the robot's head. There was another Spring Mushroom on the side of the bridge. The heroes went back into their spring forms and bounced their way forward, defeating a Magikoopa up ahead. As soon as they reached Mecha-Bowser's neck, they saw the captive Gearmos, but what shocked Sonic was that alongside the Gearmos was someone familiar to him.

"Get us out of here!" one of the Gearmos shouted.

"Mr. Sonic! Help me!" the rabbit called for Sonic upon seeing him.

"Cream! Don't worry; we'll get you and the Gearmos out!" Sonic said.

But Sonic didn't notice the fireball coming at him; he was hit by it, losing the Spring Power-Up.

"GAH!" Sonic screamed from the impact.

"Sonic!" Cream shouted.

"I've got THIS!" Spring Mario, who was currently on top of Mecha-Bowser's head, shouted as he does a high spring jump, and ground-pounds the pile of rocks.

Eventually, parts of Mecha-Bowser's head explode and its body starts to malfunction; it was about to explode.

*BOOOOOOMM!*

"AAAAHHHH!" Cream screamed while falling, but luckily, Sonic grabbed her and held her close to his body to avoid the impact. After all of the Gearmos and Mario, who had lost the Power-Up because of the explosion, landed safely on the conveyer belt, which has stopped moving, Sonic landed on his feet holding Cream with him. He gently places Cream down. A Power Star came after the explosion.

"I knew that Mecha-Bowser had the Power Star all along!" Mario said. He then looked at Sonic comforting Cream.

"Are you alright, Cream?" Sonic asked in concern.

"I'm…I'm fine. Thanks, Mr. Sonic." Cream answered.

"So she's the one that Rosalina was referring to?" Mario came in.

"Yup." Sonic nodded. "Cream, this is Mario, the hero of this dimension we're in."

"Oh, nice to meet you Mr. Mario! I'm Cream!" Cream said.

"She sure seems very young and kind." Mario said in his thoughts as he greets Cream with a soft smile.

"Mr. Sonic, I couldn't believe I was separated from my Chao Cheese…I'm so worried about him! I hope he's okay…" Cream sighed saddened.

"Hey, don't worry Cream! He's already with us safe and sound!" Sonic said in a soft tone, giving thumbs up.

"Really?! Where is he?" Cream asked.

"He's at the Comet Observatory, playing with the Lumas. That-a Power Star will take us there." Mario replied, pointing at the Power Star.

"Okay." Cream smiled.

The three reached their hands to touch the Power Star, and it glows in a bright light.

To be continued…

I chose Toy Time Galaxy for Cream since she's a child, and this galaxy was all about children things. I first planned to use the Bouncing Down Cake Lane mission since I like sweets, but I soon scratched that because I wanted Cream to be trapped somewhere, and that's why I went with the first mission instead.

Because I don't like the Spring Power-Up that much, I didn't want Sonic to get the same wrapped spring like Mario has so I went with something that's like a Shoe Upgrade, which I think it fits Sonic better (I've based off of a DeviantArt picture to describe Sonic's new Spring Shoes). If he was in the game, he would be so much easier to control than Mario, right? ;P

Another one of Sonic's friends has been rescued! Since Cream is the only one found in the Engine Room dome, that means Shadow, Silver and Blaze are all located in the galaxies from the final dome it seems. Next chapter coming soon! And please review.