This may get confusing in the future, so I'll keep a log for every time it changes.
Mind - body
Sonic - Eggman
Tails - Sonic
Knuckles - Tails
Eggman - Knuckles
Glad you're excited gabage6.2! Here's the next chapter for ya!
I stood in the doorway with a smirk on my face. My body, inhabited by Knuckles, was on the floor, bound with what must've been hundreds of zip ties. Eggman, in the echidna's body, was knelt over him.
"Sonic!" Eggman shot to his feet. "No… Tails!"
I walked up to him and glanced at Knuckles. I laughed at the excessive constraint on the tails. "You think that's enough zip ties?"
"That's what I said!" Knuckles wriggled in his plastic prison. I returned my attention to Eggman.
"Hm. So, are you gonna fight or surrender?" I really hoped that he'd surrender, but I didn't expect an answer at all. Just as I thought, he punched at me. I dodged and retaliated with a swift kick to the head, knocking him to the floor. He sprang up and lunged at me, but I was already behind him, taking his foot. I spun him around a couple times and slammed him into the wall. I began revving up a spindash when he hit the wall, and charged half a second later. Instead of hitting an echidna, though, I hit the wall. I was dizzy, but it lasted only a second. I looked up. One moment, Eggman's fists were buried in the wall; the next, they were buried in my face. I was knocked back several meters. I scrambled to my feet with an aching face. I saw that Eggman was just fine. I… I'm good at hand-to-hand combat… in my own body… but I'm not right now… I'm not Sonic… I need my own body… The machine! I'll… no, I can't with Eggman around… Time to cut my losses - I'm outta here!
I turned, scooped Knuckles up in my arms - dang, I'm light - and dashed off. I escaped the base within seconds and sprinted through the mountains. I took Knuckles directly to my house, about a minute away. Once there, I retrieved a pair of scissors and cut away at the zip ties. There were about fifty left when Knuckles became impatient and decided to break through them instead. He pushed his tails apart as hard as he could, and they immediately snapped. All of them.
"How many was that?"
"About fifty," I laughed.
"Woah, how many pounds is that?"
"A hundred seventy-five each would make that eight thousand seven hundred fifty pounds." His jaw dropped.
"No way your tails are that strong!" I nodded.
"Yup. They aren't shaped like helicopter blades, so I can't just spin them lightly and expect to create any lift. If I spin them with a few thousand pounds of force, though, it's enough to make up for it and create lift."
"We've gotta arm wrestle when we get back to our own bodies!"
"Sure thing!" I looked at my tails. The fur was pressed and flattened from the zip ties. "Follow me."
I led knuckles to my bathroom and handed him my tailbrush. "Brush them backwards until they fluff out again, then forwards - lightly - to straighten them out. They're flatter than Egghead's love life. There's no dignity in a flat-tailed fox."
"Dang, dude… Okay, then…" I left him to brush in peace. I decided to inspect the house to make sure Eggman had left everything as it was before. A few things in my workshop were rearranged, but that was to be expected. The Tornado 3 was missing, of course. It was still at Eggman's mountain base. I returned to my room and slept in my bed for the first time in five days.
x-x-x
Did I just win? I think I just won my first fistfight… I laughed. I went over to collect Knuckles from the ground, but he wasn't there. Of course… Why would Tails leave his body behind? Or his friend…
I left the room. I had nothing else to do but take the Master Emerald!
x-x-x
I knew that Eggman wanted to take the Master Emerald and that Sonic needed to be retrieved from Eggman's base. Pretty straightforward plan: get the Master Emerald, then Sonic. I wanted to relay this plan to Knuckles, so I went to my bathroom upstairs. I found that one tail was poorly fluffed and he was working on the other one. I took the brush from him. "Let me do it."
He complied, knowing that he was doing poorly. I had both tails fully fluffed in a few minutes. I put a few long stands of fur from the brush into the garbage can and set the brush in its place. "Alright, we're going to get the Master Emerald before Eggman does."
"How? The plane's at Eggman's secret base! We can't get up there unless we can fly!"
"Oh, but you can!"
x
I fitted my latest invention onto each tail. They were thin segmented metal sleeves that compressed and locked into place. "Remember what I said about my tails not being shaped like helicopter blades? Well, now they are!"
I flattened the sleeves. "I thought we just fluffed those!"
"Don't worry - they're designed to refluff them when you take them off." I locked them in place. "The thing is: they aren't tested, so that's what we're gonna do right now!"
"Cool! Let's do it!" I led Knuckles outside.
"Alright - spin your tails!" Knuckles began to trust his tails. He stopped less than a second later because they were fully wound up. "No, don't twist them - spin them separately."
"Oh." He did so and shot up in the air. I could barely see him in the sky, probably half a kilometer high. If that's the case, he'll be down in seven point fourteen seconds and reach a hundred forty meters per second. Better jump to catch him if I wanna live. Six seconds later, I jumped and caught him. It was rough impact, but not nearly as bad as it would've been otherwise.
"Let's try softer." He spun his tails much softer than last time. He gently hovered in the air and I took his hands. "Little harder now."
He did so; we began a gentle ascent. "Face them forwards and go a little harder." We began to move forward.
"Good. You know how to fly now. Let's go."
x
Knuckles flew us up to Angel Island. He went a little too hard, though, and dropped me from twenty meters up. He shot twenty more meters up from the sudden loss of weight and we both crashed to the ground.
"Ow," we grumbled in unison. We shook it off and continued to the Master Emerald's alter. Just then, I spotted my favorite orange and blue biplane headed directly towads us.
We're about to see the second clash in less than an hour's time! All reviews and stuff are appreciated!