at West Anderson High School, (Y/n), Mordecai and Rigby are driving up to the front in the cart. Rigby looks at his program list. "Alright, let's see now. Foreign language, check. Geology, check. All that's left is... bam!" Rigby said. Rigby shows the list and circles the final class. "Gym class! Once I pass this, I'll finally be able to graduate. Besides, any bozo can pass gym." Rigby said. "Then why didn't you pass the first time?" (Y/n) asked with a smirk, and Mordecai snickers. "I dunno. High school was a long time ago." Rigby said. "Alright, you little loafers. Listen up!

Coach McCrackle will no longer be teaching here." Principal Dean said. The gym class mumbles amongst themselves. "He requested that I read this letter of resignation to you all." He clears his throat. "Dear class, things are finally looking up for me. I have won the lottery. Now that I'm a rich man, I will never have to spend another second in that disgusting gym with your pimply, greasy faces ever again." It, uh, goes on like this for a while. But anyway, we found a new substitute for the remainder of the school year." He said. "A substitute? This'll be easier than I thought. Hello, high school degree." Rigby said. "So please welcome former student and 5-time volleyball champion, coach Francis Jablonski!" The door opens, and Jablonski walks into the gym in slow motion. He looks to the class and forms a smile. Rigby gasps.

~Flashback~

Teenage Rigby is standing in the hallways carrying books as he sees Jablonski running towards him with a volleyball. "Body check!" He shouted. "Jablonski, no-" Jablonski shoulder bumps into Rigby, causing him to groan and drop a few books. Later at the gym, Jablonski is practicing volleyball with 3 others. "Set me up!" He serves the ball. Rigby is walking by. The ball hits him in the face. "Aargh! Jablonski!" Later in the school field, Teenage Mordecai and Rigby are standing by as Jablonski is doing donuts, covering them in mud. "JABLONSKI!" Jablonski laughs as he continues spinning donuts.

~back to the present~

"Jablonski..." Rigby whispers. "Well, Jablonski, I'll leave ya to it." Principal Dean said. "Listen up, you clowns." The gym class is shocked. "Now that I'm running this show, things are going to be different around here." He blows his whistle. "Everyone, 20 laps! Let's go! Except for my little bro Aiden, who's already achieved peak physical fitness." The class gets off the bleachers and onto the court. Jablonski scoffs. "Look at this. I didn't know this school had a 10-year program." He said.

"Look, Jablonski. High school was a long time ago. We both matured a lot since then. Let's bury the hatchet." Rigby said. "Huh! As if! You wanna fail my class like you failed at life?" He asked. "No, sir." Rigby relied fearfully. "WELL THEN GET MOVING!" Rigby, Milton and the class run to the middle of the court, where they start doing jumping jacks. " ...58, 59, 60..." Jablonski said. Francis and his brother are on the bleachers, eating pizza. "Let's go! More jumps, less jacks!" Rigby is struggling to climb a rope in the gym.

He reaches the top and falls off. Francis blows his whistle. "Get back on the rope, you Butterfingers! This ain't naptime!" The gym class is running across the field with the Jablonski brothers driving behind them. "Come on! Let's hustle! Only 3 miles left!" The gym class is washing the Jablonksis' car. "That's right! Put your backs into it! I want the Jablonski mobile spotless before lunchtime." Jablonski said. "What does this have to do with gym class?" Rigby asked. "EVERYTHING! Now get scrubbing!" Rigby growls. Later Rigby is at the door to Principal Dean's office. "Let me get this straight. You want me to fire Jablonski?" Principal Dean asked. "Yes, Principal Dean." Rigby said. Principal Dean sighs. "I can't fire him, but I can talk to him on your behalf about the car thing." He said. "What?! No! Don't mention me! He'll only make things worse if he knows I told you." Rigby said. "It'll be totally anonymous, don't worry about it. Your secret is safe with me." Principal Dean said.

At school, the principal is on the gym court behind Jablonski. "Alright now, before we begin, I have an announcement to make. Principal Dean just told me that someone here has a problem with my teaching." Jablonski said. "Totally anonymous." Principal Dean said, and Rigby gulps. "Well guess what? That someone just earned you all extra laps!" The class grumbles. "Aw, man! I can't believe someone snitched!" Rigby said. Jablonski blows his whistle, and everyone walks down to the court. "Let's go! Get to it!" Rigby whistles innocently as he goes down.

"Hold it, Rigby. I got a special assignment for you. Aiden!" Aiden comes into the gym with a bucket full of dishes. "You get to wash my dishes." Aiden sets down the bucket in front of Rigby, causing water to splash onto his face. "You can't do this! You're just a substitute!" Rigby shouted. "I can do whatever I want. I know you ratted me out, Rigby. Good luck passing my class now. Might want to put some elbow grease into it. Some of that food has really kicked on there!" He and Aiden walk away laughing. Rigby angrily gets started.

"Might wanna put some elbow grease into it." Rigby said mockingly. Later that night at Pops' house, Rigby is lying on the sofa groaning. Mordecai and (Y/n) walk in. "Dude, what's the matter?" (Y/n) asked. "Can't keep up with the high school kids?" Mordecai asked, and (Y/n) elbows him. "Ow!" He glares at her. "Worse. It's Jablonski! He's the new substitute for my gym class!" Rigby said. "Whoa, he's a sub now? I thought he'd be in jail or something." Mordecai said. "Who?" (Y/n) asked. "Just an old teacher of ours. And he's a real jerk too." Rigby said, he stood up.

"Aah! It's not fair! I've done everything to get my diploma! I fell down a cave hole, went all the way to China, just so some meat-head can fail me in gym class. It's all for nothing!" Rigby said. (Y/n) sat next to him. "It hasn't been all for nothing at all, Rigby." She said, patting his back. "Yeah, you just have to beat him at his own game." Mordecai said. "But I'm terrible at volleyball!" Rigby said. "What was that other thing he was into? Food...Run?" Mordecai asked. Rigby gasps. "Yeah." He said. At West Anderson High in the locker room, Rigby is carrying a stack load of dirty gym clothes, knocking into other students on the way. He finally sets it down in front of Jablonski, who is checking his timer.

"These times are pathetic." Rigby sighs and goes back. Milton is screaming and running away from Aiden as he smacks him with a rug. Aiden stops next to his brother. "A+ work, Aiden. Man, I'm starving." As Rigby opens his locker, a surprised look appears on his face as he hears the conversation. "Do they still do 'Taco Tuesday' at the cafeteria?" Jablonski asked. "You could do 'Taco Tuesday', or you could go on a..." Rigby closes his locker. "...Food Run." He said. "Food Run? I haven't played that since high school. The glory days." Jablonski said. "W-What's a Food Run?" Milton asked. "Don't you know anything, Milton?! Food Run is a game where two teams order takeout from the same place.

They race to the restaurant and the first team back with the food wins. I've never lost in my life." Jablonski said. "Jablonski, I challenge you to Food Run! If I win, you have to give me a pass in Phys Ed! Hmm-hmm!" The gym boys gasp. "Rigby, no!" Milton shouted. Jablonski shows a competitive smile. "Alright. But if I win, you fail. And you gotta wash me and Aiden's dirty jock straps for the rest of the semester." Rigby gasps. "Y-You're on!" Rigby said. "Tommorrow night at midnight. We'll run to the Cheezer's on the bad side of town. You're going to lose, Rigby. Once a loser, always a loser!" He walks out of the locker room. "What are you gonna do, Rigby?" Milton asked. "I'm gonna need some help." Rigby said.

At the kitchen in Pops' house, Milton unfolds a map on the table and marks a road path from the school to Cheezer's. He and the classmates are outside the house as they watch Rigby drive the cart to the house, (Y/n) keeping record of the time with his timer. They move out of the way as Rigby comes to a stop. He comes out and goes into the house. He comes out with a lunchbag and throws it, causing it to hit a classmate's face. (Y/n) shakes her head at the time. Then the same classmate stood and held the lunchbag as Rigby drove toward him. He circles around, trying to grab the lunchbag, but fails. In the kitchen, Milton is checking his timer.

Rigby runs in and grabs the lunchbag from the table. He goes back outside and drives off in the cart. He is heading toward Mordecai and a few classmates, who cheer him on. Just as he is going to make it, he blows a tire. They all grieve over the busted tire until one classmate spots someone coming. It is Don, Rigby's brother, who has brought his car. He hands Rigby the keys, and he sets off, but not before tossing the lunchbag behind, which Milton catches. At night time at West Anderson High, the Jablonski brothers, Principal Dean and the rest of the gym class are waiting. On Francis' watch, it is 11:59 p.m. "I knew he wouldn't show. Probably past that little chicken's bedtime." Jablonski said. "Heh, he's probably all nestled up in his chicken coop." Aiden said, and both laugh. "Chicken."

They continue laughing until they see someone drive up. Everyone is shocked, even the marshal girl who blows a bubble in her face. It is Rigby, with Mordecai and (Y/n), Mordecai parks up next to the mobile. " Evening, Jablosers." Rigby said. The two brothers approach them. "Well, well, well. Three dweebs for the price of one. Where'd you get that ride, twerp?" Rigby adjusts the mirror. "Borrowed it from my little bro, who's way cooler than your little bro." Rigby said. "Oh yeah?" Jablonski then spots (Y/n). "Oh and is this the little girl you're doing this all for?" Mordecai and Rigby turn to (Y/n), then glare at Jablonski. "What a waste; seriously, I can't believe you're doing this all for that." He said as he gestures to (Y/n), and Rigby growls.

"Insulting (Y/n)? You just made a big mistake, Jablonski. You are SO going down!" Rigby shouted angrily. Team Rigby and Team Jablonski are in their vehicles. The marshal girl has her flag raised. "Alright. The first team to pick up their food and make it back to the front steps wins!" Milton is at the steps, waving around. The girl laughs. "Gentlemen, get ready to place your orders!" Francis raises his phone, and Rigby raises his with confidence. "On your mark, get set, GO!" Rigby pushes one button while Francis dials the Cheezer's number. Francis' side listens for the pickup, but there is only beeping. "Ugh! It's busy?!" Team Jablonski glares at Team Rigby, who has the early call.

"Hmm-hmm-hmm. Speed dial." Mordecai said. At Cheezer's, a waitress and chef are working. The waitress receives the call. "Cheezer's." She enters Rigby's order. "Yep. Mmm-hmm. Extra cheese...got it. Alright, see you soon. We got a food run!" She said to the chef. "Ok, let's go!" Rigby said. Team Rigby drives off, leaving Team Jablonski behind. Francis gets frustrated and hands the phone to Aiden. "Forget it! I'm just ordering at the drive-thru!" Team Jablonski drives off as Team Rigby drives through the town, a sign that says 'Now Entering The Bad Part Of Town' is close by. "Hey, it's not so bad here." Rigby said. In car view; a dirty businessman is in their way. He turns and sees the car. "Get off my property!" Team Rigby screams. Rigby drives out of his way and into a garbage can, spewing it over and leaving the car stuck.

"Aahh, no!" Team Jablonski drives past them laughing, putting them in the lead. "Keep your eyes on the road, Grandma!" Aiden serves a volleyball in the air, which hits Rigby in the head. "JABLONSKI!" Rigby shouted. Team Rigby pulls out and gets back on the road, starting to catch up to Team Jablonski. Jablonski's team is still ahead and Rigby's team is still catching up. Principal Dean has the tracker, and the class is watching closely. "Jablonski's almost there!" The two teams are almost at Cheezer's. Team Jablonski turns toward the drive-thru. Team Rigby follows.

"Aaah! He's pullin' the drive-thru move! That's so much quicker!" Rigby decides to reverse into a parking space. He then jumps out and runs to the Cheezer's entrance. He reaches the counter, tired. "Pickup for Team Rigby!" The Cheezer's guy is grilling the cheese sandwich for the pickup. "Uh, it's almost ready.: at the drive-thru window, Team Jablonski is waiting. Jablonski glares at Rigby, who glares back. The Cheezer's guy finally has Rigby's order in the bag. He goes to give it to Rigby, who takes it without question. "Sorry, it's my first day." Rigby throws the money in his face and runs out. "Aw, c'mon!" Rigby runs back toward the car; the Cheezer's guy is frantically trying to swipe Jablonski's card to confirm payment, his order prepared.

"Just gimme my food!" Jablonski shouted. "It's my...It's my first day!" Rigby finally jumps into the car with his food. He holds it to (Y/n). "Hold this." He said. (Y/n) does so and Rigby steps on the gas pedal. They drive out of the parking lot. At the drive thru, the Cheezer's guy gives Jablonski his food. "Finally! Let's go!" Team Jablonski drives off. Mordecai is looking at the map. "What's the map say?" Rigby asked.

Mordecai points. "Go up here! There's a shortcut!" He said. At a split road, Team Rigby takes the second path. Team Jablonski takes the first. "Look out!" (Y/n) shouted. There are a bunch of hobos walking on the road in their way. Rigby swerves around them. A bunch of hobos are hanging around a fire bin. They notice the car approaching and run away as it knocks down the bin. It heads straight for a fence. Rigby screams and swerves to a ramp near the fence. Team Rigby screams as they go up the ramp and in the air, then land back down on the road next to Team Jablonski.

"Sauce me, bro." Aiden takes out the cheese sauce from the bag and gives it to his brother, who tears it open with his teeth and throws it over his shoulder, causing it to land directly on the windshield of Team Rigby's car. Rigby screams. Nine cats jump onto the car to start licking the sauce, further blocking the view. Rigby stands in the vehicle. "Shoo! Go away!" The dirty hobo from before jumps onto the car, causing Rigby to fall back into his seat.

"I SAID GET OFF MY PROPERTY!" Team Rigby screams again. They try swerving to shake everything off the windshield. The two teams are now leaving The Bad Part of Town. The school is just ahead. "Aw, yeah! We're gonna win!" Jablonski said. "Jablonski! Jablonski! Jablonski!" Team Rigby swerves into the side of Jablonski's car, causing them to both start rolling. They land back on wheels. The gym class move out of the way before they crash into the sidewalk.

Jablonski comes out groaning, as does Rigby. Rigby and Jablonski stare at each other. Jablonski takes his food from Aiden, who appears unconscious. He makes a weak run for the steps before tumbling. Mordecai gives his food to Rigby who follows suit. "Go beat Jablonski, dude!" Mordecai said. Rigby and Jablonski are heading to the finish. In distorted slow motion, Rigby is power-walking, catching up to Jablonski and holding his arm. Jablonski is crawling all the way. When Rigby starts to pass him, he slaps Rigby down on his legs, tripping him. "Rigby!" (Y/n) shouted worriedly. "Beat him, Rigby! Beat him so you can finally get out of my school!" Principal Dean shouted. Milton looks on with a drop of sweat running down his face. The two rivals are crawling to the finish with the food in their hands, until Rigby finally pushes ahead. Jablonski stops crawling.

"Noooooo!" Rigby plants his food on the front steps first, Jablonski a split second after. Which means.. "Team Rigby wins!" The gym class cheers for Rigby, along with (Y/n). "Yeah-yuh!" He raises his bag in victory and plants it back down. Jablonski sits on the steps in defeat as the class and Principal Dean run to Rigby, still cheering. Aiden goes to his brother. "You did it, dude!" Mordecai said. "Nice going, Rigby." (Y/n) said, and pats his head, messing up his hair. "Hey!" Rigby squeaks, he fixes the mess (Y/n) made, and (Y/n) laughs. All eyes are on Jablonski, who starts crying. Aiden pats him on the shoulder. Rigby walks down to him. "It's not fair! I used to be the king of this school, now I'm just a lame, old substitute teacher who can't even win at Food Run!" He buries his face in his hands and continues crying.

"Come on, man. High school was a long time ago. You gotta get past the glory days and move on with your life. Focus on the now!" Rigby said. Jablonski sniffs. "You're right. I gotta say, I got mad respect for that response, and for you. So much respect that I'm gonna embroider your face onto my letterman's jacket!" He said. "Oooh. No, that's cool. Uh, you can just pass me in gym class." Rigby said. "You got it, bro!" Jablonski uses a marker to check off "gym.". Everyone jumps into a freeze frame victory. "Yeah!"