The pic above is Gumball in his training gear.

Gumball's POV

"You're really disappointing me right now." Mystery strait up told me. "No I'm not!" I dashed after him again but he grabbed my arm, twisting it and planted me in a wall. "You're lousy. You should train on your own more." I kicked him away. "I'm not lousy!" My arms glowed and I punched him square in the face. "Wrong person." I heard a voice behind me then I got kicked away. I tried to land on my arms but I only scratched the ground before rolling away and finally stopped. "Come back when you have improved." Mystery agitatively said then walked away. I plopped up on my butt and sighed. "What am I doing? I should kicking his ass not getting my ass kicked." I stared at my hands before dropping them in my lap. "Why aren't I fighting him like I did with those bad guys? Or the time when I fought Jessie? Twice!" I groaned and lay down on the floor. "I am getting lousy."

Day 2...

"Alright. One more time!" I shouted then I dashed after Mystery. I sent a fist to his face but he dodged it smoothly by leaning back. I took this as my advantage and tried to trip him. I was unsuccessful in my plan because he backflipped twice. "Is that all you got?" He mocked me. Anger built inside me causing me to dash after him without thinking. "I'm not lousy!" I leaped and punched him down. "I'm not weak!" I kicked him in the side. "I'm stronger!" I punched him up sending him flying in the air. "Than YOU!!" I leaped up high and continuously started to punch him until his back hit the top of the dome. I grabbed his shirt and threw him towards the ground. He landed creating a crack and I landed on him foot first creating a huge crater. I panted heavenly. I then heard laughter. It got louder and louder until it stopped. "Fool. Getting enraged and using it against your opponent is your weakness." Mystery stood up, not a scratch in sight then he folded his arms. "Your opponent will definitely see through your plan and then plan around your plan, causing your plan to fail and their plan actually a plan that works!" I cocked my head in confusion. "Huh?" He closed his eyes. "By the way, that's not me." That last sentence came from behind me. I turned and saw Mystery with his hand glowing a light green. He used it and punched me in the stomach. Then he kneed me in the face sending my head flying up and he jumped and kicked me in the face creating another hole. I'm in so much pain right now I can't even move! "Like I said, lousy. Don't disappoint me again." He left.

Day 3...

I tried to kick Mystery in the side but he did a split and punched me in the place that makes every man goes crazy. "HOLY FUCK NUGGETS!!!" I crouched and clutched my nuts tightly. "If that hurt so much then chop it off." I glared at Mystery as he shrugged.

Day 4...

"Not a chance!" Mystery shouted as I tried to throw a huge boulder at him. Don't ask where I got it from. He punched through it sending multiple small rocks in my face. "Shit!" I looked at where I last saw Mystery but he was nowhere to be found. "Where are you? You little coward?" I felt a hard blow in my face. But I saw no one. "What?" I felt another one in my side nearly causing me to fall. Then I felt a kick on my butt. I jumped. "Hey!" I tried looking around to see where he was but I couldn't see him. "I'm invisible you moron." I heard his voice beside me. Got him! I punched to the right but I only punched the air. "Nice try!" I got kicked on my back sending my crashing to the ground. A lot of dirt found its way into my mouth. "Interesting fact, did you know that you could have used your powers to sense my energy?" He said. I spat out the dirt. "Thanks for the tip. And why did you chose dirt out of all things?"

Day 5...

Mystery held my leg and threw me through the dome sending me deep in the ocean. I tried to swim but I suck at it, I should've went to the swimming class Darwin was forcing me to join. I felt an arm on my tail and I was swaying backwards back to the dome. "Lousy!"

Day 6...

I was set on fire by Mystery. He tried to put out the fire with his hand. That crazy old bastard. "Lousy!" His hand caught on fire.

Day 7...

I got crushed under a huge rock. "Lousy!"

"Lousy!"

"Lousy!"

"Lousy!"

I screamed and punched a tree breaking it. "I'm not lousy!" I kicked a rock but without thinking so I broke a toe. "Ow!" I hopped on one foot while holding the other in my hands. I sat down and covered my toe with my hand and healed it. Mystery taught me that. I sighed hard. "Why can't I beat you once?" I asked Mystery who was relaxing on a hammock strung between two trees. "Because your too soft. Your mind is preoccupied with something else other than the battle." I looked at him. "When you were fighting me, I noticed that you looked distant other than the situation you're in. I know that you're thinking about Rachel." I sighed again. He's right, I was thinking about Rachel. "Listen Gumball. In times like fighting, you should be tough. Thinking about someone you hold most dear is only gonna lead to your downfall." He started humming a tune. "When you fought Jason, the only thing running through your mind was revenge for something. And the same goes for the time with Jessie. Well you were only toying with her the second time. You weren't enraged or anything." I picked up a pebble and threw it in the sea. It skipped 5 times before it sunk. "You know. You're not so bad after all." He chuckled at my statement. "Apart from the part when you think I'll destroy your universe." Now it was my turn to chuckle. Then a thought came to me. "Hey, you said that you can sometimes predict the future right?" "When I want to do it, I do it." He replied back. "What's gonna happen when I leave for the Comet? Or when I return? Or far in the future?" I asked. He stared out into space. He said nothing. The night sky was actually beautiful from here. "Somethings are better off not worth knowing until the time comes. Does that answer your question?" He answered. "Not quite. But I can live." I lay my head down. "I think I will definitely know what to do tomorrow." I said then fell asleep.

The Next Day...

I tightened my black belt around my waist. I inhaled then exhaled and opened​ my eyes. I walked out into the training space where Mystery was waiting for me. "This is your last day. The Comet will arrive at Neptune in the next 24 hours so don't screw this up." I nodded. I closed my eyes and cleared my mind of everything that will distract me. Darwin, Penny, Anais, Dad, Mom everyone. Rachel popped up....she was hard to get rid of..then finally she was gone. "The training starts..." Don't fuck this up. "..Now!" I dashed after Mystery keeping a clear mind. He punched at me but I blocked it with a punch of my own. He tried again but I did it again. We continued like this until we were picking up speed and started punching at each other. I was the first to break it, I slide sweeped Mystery off the ground and kicked him further away. He landed on his feet and he cracked a chuckle. He did a hand sign and a star marked itself underneath him glowing green. Green fire balls started to launch at me. I circled the whole area while dodging and jumping over them. I bent down while one flew over me and I started running in the direction where Mystery was. He did another hand sign and the ground behind me started shooting out blast that went strait up. I dodged most of them but I got caught in a blast that Mystery sent himself. He disappeared in a light of green energy and appeared above me trying to punch me down but I caught ahold of his fist before we jump parted and landed on the ground. I had scratches here and there but Mystery was still unscratched. That got me enraged but I concentrated on the most important part. "Seems like my little talk worked. Well then, let me make it easier. If you can land one blow on me that will leave a mark then I'll let you win." Is he serious? "Sounds too easy." I cracked my knuckles and smiled. He closed his eyes and he slowly turned transparent until he was gone fully. "But it won't be that easy." Of course it won't! Why did I say that? Concentrate on your energy. Let your power flow through your veins and to your mind. "I really don't need you to say anything." I retorted. "Whatever." Mystery replied back. I looked around scouting to see where he'll strike next. I sensed a fist and I blocked it with my hand. I sensed something else so I flipped over a green blast that was sent towards me. Then I started blocking multiple fists that I sensed coming from all directions. Then I managed to grab ahold on his wrist and I threw him in a wall. He then reappeared. I raised my fist and punched him square in the face creating multiple cracks on the wall. Water started leaking in. "To be honest that punch hurt. But not a scratch!" He started laughing. I used my power to make my hand glow and I punched him through the wall. Water gushed in with so much force that I was sent floating away. I hit a rock, I managed to lift and throw it to where the hole was stopping the rest of the sea from getting in. I sighed. "I didn't kill him did I?" I heard a whooshing sound then a huge splash. "It'll take lot more than water to kill me. I'm an excellent swimmer." Mystery boasted behind me. I looked at him and saw a bruise forming around his nose, eye and lip, due to a patch at his mask. I was shocked. I pointed at him. "Y-your face. I got you! I bruised your face!" I laughed. Mystery grabbed a mirror out of no where and looked at himself. "Well shoot me sideways. You did." He looked at me and chuckled. "Not bad. Not bad at all." Man I feel great. "Well. I'm off to get some rest." I walked off. "Hold on a minute. You're staying right here!" Mystery demanded. "Why?" I asked. "You have a wall to fix." He said pointing to the rock covering the hole. "Fuck nuggets."

Honestly I loved this Chapter. It was so awesome to write. I wanted to add more stuff but I'm running out of juice so be happy with what you get.
Anyways,
Cheers!✌😸