Bloody Knuckles and worn out shoes
Sonic and his friends were enjoying his 20th birthday after Classic Sonic had left back to his timeline. Sonic was talking with Tails until Shadow walked up and said, "You only beat me because you got lucky faker!"
Sonic laughed and said, "I beat you Shadow because I'm better then you buddy," as Sonic punched him lightly in the arm.
Shadow scoffed and then walked back to re-join Rouge and the Chaotix's. Sonic and Tails looked at the big tree and saw Knuckles leaning up against it rubbing his forehead. Sonic and Tails looked at each other then slowly walked over to their red friend. "Yo' Knux! What's up buddy?" Sonic said as he reached for a fist bump. Knuckles growled a little and Sonic slowly pulled his arm back. Tails had a look of confusion on his face.
"Knuckles? What's wrong?" Tail's asked sounding worried.
Knuckles looked at his 2 furry friends and said, "I'm annoyed and don't want to talk Sonic, so why don't you just leave me alone!"
Sonic and Tails slowly walked away and said, "Gee I wonder what's wrong with Knuckles?" Tails shrugged and then Sonic looked at Amy who was staring at him from a distance. He slowly started to walk towards her. Sonic didn't have to walk more then 3 steps before Amy was standing right in front of him, staring into his deep emerald eyes. "I saw you staring at me Sonic, what is it you would like? Do you want to talk to me? I hope you want to talk to me!" as she said practically begging him. Sonic backed up a little and then said, "No actually I was wondering if you knew what's wrong with Knuckles?"
Amy looked disappointed but then she answered Sonic. "No Sonic I don't what's wrong with him? After I hit him into the tree I didn't say anything to him." Sonic closed his eyes and thought for a moment and then re-opened them. He thanked Amy and then walked over to Rouge.
"Hey Rouge, Do you know what's wrong with Knucklehead over there? He's really mad about something."
Rouge smirked and said, "Sorry Big Blue, I don't know what's bothering him? Something always is, I didn't take his precious emerald this time."
Sonic was now a little worried and it didn't help when he saw Knuckles trying to smash the tree with his bare hands. Sonic then walked over to the Chaotix's and saw Vector and Charmy arguing then looked at Espio who was looking down. Sonic said, "Hey guy's um I was wondering if you knew what was wrong with Knuckles?"
Espio was about to answer, but Vector interrupted (as usual) and said, "No we don't know and we don't really care Sonic we're busy here doing important detective work or something." Espio looked at Vector and then raised one hand to speak but was interrupted once again by Charmy's squeaky voice.
"Sorry Sonic! We haven't figured out what's wrong with him but we're working on it!" Charmy screeched. Sonic covered his ears and then said, "Ok whatever I'm gonna go, have a good rest of the party guys." The Chaotix's went back to arguing after Sonic left and then everyone heard a loud yell of pain. They all turned to face Knuckles and then saw that his hands were covered in blood and the tree had fallen over.
Everyone was scared to see what Knuckles would do next. Knuckles was panting heavily and was drenched in sweat from all of his punches. Sonic slowly walked up to the red echidna and placed a hand on his shoulder. Knuckles slowly looked up and looked Sonic right in the eyes. He noticed that Sonic seemed different and then Knuckle's vision made Sonic look like his dark form. Knuckles quickly back away and Sonic said, "What's wrong buddy? Are you alright?!"
Knuckles had a look of sorrow and fright on his face after Sonic asked that question. "Don't come any closer or I'll kill you all!" Knuckles screamed as he readied his fists. Knuckles saw everyone as dark forms and their voices to him sounded disoriented and deathly. "Knuckles hun? What's wrong with you," Rogue asked sounding strangely worried.
Sonic reached out to grab Knuckles but he started unloading fast and hard punches into Sonic's chest. Sonic couldn't keep up with the speed of his strikes and didn't even try to fight back. After Knuckles had slowed down with his punches, Shadow ran towards Knuckles and kicked him in the chest making him clutch and squeeze it in pain. Knuckles quickly recovered and dove at Shadow tackling him to the ground pinning him in seconds. Knuckles then punched Shadow a few times in the face then they started to roll around. He punched Shadow a few more times and then stood up.
Knuckles then quickly turned around and started to run away as fast as he could. Everyone only watched as he disappeared from the field in a flash of green light. Sonic stood up and weakly walked over to Shadow. He helped him up and Shadow snarled, "Hey! Where the hell did my emerald go?!" Sonic pointed to the light green mist and Shadow cursed under his breath. Everyone was looking at the area of where Knuckles teleported from then looked at Sonic and Shadow.
Both hedgehogs looked at each other with slightly opened eyes and then both fell over. Everyone ran over and saw them both face down in the ground. The last thing both of them heard before the passed out was, "Someone call an ambulance!"