Synchro what?
The protagonists are dueling a random guy.
Atem: "Okay. I sacrifice my Watapon to Tribute Summon my Dark Magician Girl. Then I activate my Sage's Stone to Special Summon my Dark Magician from my Deck. Then I activate my Black Magic Ritual and I sacrifice my Black Luster Soldier from my hand to Ritual Summon my Black Magician of Chaos. I end my turn. Now show me what do you got, guys."
Judai Yuki: "It's my turn. I activate Polymerization and fuse my Elemental HERO Neos with Rainbow Dragon, which I conveniently borrowed from my best friend Johan, so I can Fusion Summon Rainbow Neos."
Atem: "Fusion Summon? Cute! Btw, fusion is kinda lame-"
Yusei Fudo: "Now it's my turn! I tune my Formula Synchron with my Junk Gardner and my reduced Junk Warrior to Limit Over Accel Synchro Summon my Shooting Quasar Dragon!"
Atem: "Synchro what?"
Yusei Fudo: "Synchro Summon! I did this several times before just to summon my Shooting Quasar Dragon. Do you pay any attention to your friends?"
Atem: "We are friends?"
Yuma Tsukumo: "-now I Xyz Summon my Number 39: Utopia Beyond."
Atem: "What summon? How do you pronounce it? This Ex-something."
Yuma Tsukumo: "'Ex-iez' Summon. I did this before during the entire duel! Do you always ignore your friends?"
Atem: "You're not my friend! ...And your monster is lame."
Yuma Tsukumo: "It's not! The monsters of the opponent have 0 ATK now!"
Atem: "Really?"
Yuya Sakaki: "-I Pendulum Summon Odd-Eyes Pendulum Dragon and Performapal Hammer Mammoth. Together with Rune-Eyes Pendulum Dragon, Beast-Eyes Pendulum Dragon and Dark Rebellion Xyz Dragon, I have five monsters now. Sorry, it's the best I currently have."
Atem: "Seriously, how many summons will this game gain?! I don't know what's going on anymore! I'll end this! I activate my Graceful Charity-"
Yuya Sakaki: "I thought this card has been banned for years."
Yuma Tsukumo: "Yep."
Yusei Fudo: "Me too."
Judai Yuki: "Pretty long time, bro."
Atem: "We're playing the Traditional Format, morons. I sacrifice my three monsters to Normal Summon The Winged Dragon of Ra. Now I activate Monster Reborn and Premature Burial to Special Summon Slifer the Sky Dragon and Obelisk the Tormentor from the graveyard."
Yusei Fudo: "Banned cards again."
Judai Yuki: "Premature Burial is banned?"
Yuma Tsukumo: "There was a time when this card was banned, but Monster Reborn was limited."
Yuya Sakaki: "When I read this, I thought they were going crazy... but Raigeki has been unbanned."
Atem: "Silence, idiots! I sacrifice my Egyptian God cards to Special Summon The Creator God of Light, Horakthy. Now I win this match automatically. See guys. I brought the victory."
Yusei Fudo: "By using banned cards."
Atem: "Silence! We won!"
(beat)
Atem: "Pooh... Imagine if the opponent had Bottomless Trap Hole. That would screw my strategy. Or your monsters."
Yusei Fudo: "Does not work on my dragon."
Yuma Tsukumo: "On my Number F0: Future King Hope neither."
Yuya Sakaki: "He had a Bottomless Trap Hole on the field. But we had Jinzo on the field."
Atem: "We did?"
Judai Yuki: "Yeah. Jonouchi summoned it many turns ago. And it was standing here the whole time."
Atem: "Wait! When was Jonouchi part of the duel and where is he?"
Judai Yuki: "He's standing right next to you the whole time."
Atem: "What?!"
Jonouchi: "Do you pay any attention to your friends, nyeh~?"