Anime and Manga
Sonic: What? This world isn't big enough for both of us, and one of us has to go?
[Metal Sonic nods]
Sonic: Well, I agree!
[Metal Sonic nods]
Sonic: Well, I agree!
"Me Buu, not you."
— Kid Buu, Dragon Ball Z
Fan Works
<Ohhhhh, don't you wish, Lightsister,> sneered the dark woman. <I can find my child. After our war, I will find him. Or her. There is nothing left to us now, except the fight. You would not tolerate my existence, nor I yours. I am not capable of your empathy, of your petty virtue. You are not capable of my ruthlessness and power. Come, sister. Let us destroy each other.>
— Satan Girl, Hellsister Trilogy
Remoni-Notra: I congratulate you on your victory, Green Lanterns. Nonetheless, I must prove my claim to the crown, as is our custom, by combat.
John Stewart: Now, wait a minute. This woman's just been through hell and a half. You can't expect her to just get up and fight you like that. I don't care what kind of customs you've got. You do that, and we're gonna show you an old custom from my old 'hood—the gang fight.
Carol Ferris: It is the tribal custom, John. There are four Star Sapphires in each generation. They battle until all but one is defeated. The one who remains is the true Star Sapphire. By their law, I am required to... to fight her.
John Stewart: Now, wait a minute. This woman's just been through hell and a half. You can't expect her to just get up and fight you like that. I don't care what kind of customs you've got. You do that, and we're gonna show you an old custom from my old 'hood—the gang fight.
Carol Ferris: It is the tribal custom, John. There are four Star Sapphires in each generation. They battle until all but one is defeated. The one who remains is the true Star Sapphire. By their law, I am required to... to fight her.
Film
Yu Law: After this, there will be only one.
Gabe Law: I will not be the one, but neither will you.
Gabe Law: I will not be the one, but neither will you.
— The One
Literature
"What use is there in my becoming a companion to you? On the contrary, sworn brother, in the black night I would haunt your dreams, in the bright day I would trouble your heart. I would be the louse in your collar, I would become the splinter in your door-panel... as there was room for only one sun in the sky, there was room only for one Mongol lord."
— Jamukha, The Secret History of the Mongols
Live-Action TV
White Ranger Clone: I'm tired of living in your shadow. After this, there will be only one White Ranger.
Trent: And I got no problem with that. White Ranger, Dino Power!
Trent: And I got no problem with that. White Ranger, Dino Power!
Newspaper
Apparently every time one of your other selves dies, his power is distributed among the survivors. If Yulaw kills 123 selves, he has the power of 124. Follow this logic far enough, and retirement homes would be filled with elderly geezers who have outlived their others and now have the strength of 124, meaning they can bend canes with their bare hands and produce mighty bowel movements with scornful ease.
Video Games
"The world needs only one Big Boss!"
— Solidus Snake, Metal Gear Solid 2: Sons of Liberty
"Like in that foreign movie where there could only be one, and in the end there was only one, because that was the point."
— Kenji, Katawa Shoujo
Kreese: There can only be one number one in this fight to the death!
Howard: Well, DUH! It's a mathematical fact that there can only be one number one!
Kreese: For the last fucking time, nobody said there'd be math!
Both: [singing] III BLAAAME OOOUR SCHOOOOOLS!
Howard: Well, DUH! It's a mathematical fact that there can only be one number one!
Kreese: For the last fucking time, nobody said there'd be math!
Both: [singing] III BLAAAME OOOUR SCHOOOOOLS!
— Madworld
"Ya know why I lost my cool back there? I hate bein' called the Dragon of Kansai. Dragon, I don't mind. But the Kansai part pisses me off. A dragon don't know Kansai or Dojima. We only need one dragon in our world. Ain't room for more."
— Ryuji Goda, the "Dragon of Kansai" to Kazuma Kiryu, the "Dragon of Dojima", Yakuza Kiwami 2
"Now that my plan is finished, you are no longer of use to me...There only need be one ultimate Mega Man...Me!"
"The. First. Godwoken. To. Enter. The. Wellspring. Becomes. Divine.
May. The. New. Divine. Be. Worthy.
For. The. Rest. May. He. Have. Mercy. On. Your. Soul."
May. The. New. Divine. Be. Worthy.
For. The. Rest. May. He. Have. Mercy. On. Your. Soul."
— The Eternal Arbiter, Divinity: Original Sin II
Keiji Shibusawa: You're not the only one with a dragon on his back, boy. I'll kill you, surpass Kazama, and become the Dragon of Dojima!
Kazuma Kiryu: You can keep the cute nickname. But - there can be only one dragon.
Keiji Shibusawa: Yeah... I couldn't agree more.
Kazuma Kiryu: I'll give you your fight.. and I'll end your war!
Kazuma Kiryu: You can keep the cute nickname. But - there can be only one dragon.
Keiji Shibusawa: Yeah... I couldn't agree more.
Kazuma Kiryu: I'll give you your fight.. and I'll end your war!
— Yakuza 0
"There can be only one!"
—The Baron in Lords of the Realm 2, calling off an alliance with the player
Joker 1: Two Jokers walk into a bar.
Joker 2: And only one leaves!
Joker 1: I like how you think.
Joker 2: And only one leaves!
Joker 1: I like how you think.
Shang Tsung 1: I did not clone myself.
Shang Tsung 2: Shao Kahn made me to replace you.
Shang Tsung 1: Genius cannot be replaced.
Shang Tsung 2: Shao Kahn made me to replace you.
Shang Tsung 1: Genius cannot be replaced.
Shao Kahn 1: There cannot be two Kahns.
Shao Kahn 2: One of us dies today.
Shao Kahn 1: Agreed.
Shao Kahn 2: One of us dies today.
Shao Kahn 1: Agreed.
RoboCop 1: Where did you come from?
RoboCop 2: The RoboCop program, phase 2.
RoboCop 1: I will not be cloned.
RoboCop 2: The RoboCop program, phase 2.
RoboCop 1: I will not be cloned.
Kung Lao 1: The world only needs one of me.
Kung Lao 2: Then I will be the one.
Kung Lao 1: I was here first, doppelgänger.
Kung Lao 2: Then I will be the one.
Kung Lao 1: I was here first, doppelgänger.
Joker 1: Two Jokers, like a deck of cards.
Joker 2: But we need only one.
Joker 1: Right. We're not playing a full deck.
Joker 2: But we need only one.
Joker 1: Right. We're not playing a full deck.
Superman 1: You know what I'm about to say?
Superman 2: "This Earth only needs one Superman"?
Superman 1: Something along those lines.
Superman 2: "This Earth only needs one Superman"?
Superman 1: Something along those lines.
Batman 1: Who is it under the mask?
Batman 2: I'm the hero Gotham needs.
Batman 1: We can't both be.
Batman 2: I'm the hero Gotham needs.
Batman 1: We can't both be.
Bane 1: We are both sons of Peña Duro.
Bane 2: Yet only one may remain on this Earth.
Bane 1: I will throw you from the cliffs of Point Tiburon.
Bane 2: Yet only one may remain on this Earth.
Bane 1: I will throw you from the cliffs of Point Tiburon.
Black Manta 1: I hate the multiverse.
Black Manta 2: That makes two of us.
Black Manta 1: There can be only one.
Black Manta 2: That makes two of us.
Black Manta 1: There can be only one.
Donatello 1: Two Donnies enter, only one leaves.
Donatello 2: That is way dark for us, dude.
Donatello 1: Dark for you, maybe.
Donatello 2: That is way dark for us, dude.
Donatello 1: Dark for you, maybe.
Gorilla Grodd 1: Pretender to my throne...
Gorilla Grodd 2: I am the real gorilla.
Gorilla Grodd 1: There is no Grodd but Grodd.
Gorilla Grodd 2: I am the real gorilla.
Gorilla Grodd 1: There is no Grodd but Grodd.
"A fight is about who's left standing. Nothing else."
— Heihachi Mishima, and later attributed to Kazuya Mishima, Tekken 7
Web Original
Girl 1: My boyfriend said I’m the most beautiful girl in the world!
Girl 2: [giggles] My boyfriend said that too!
Girl 1: [stabs Girl 2] THERE CAN BE ONLY ONE.
Girl 2: [giggles] My boyfriend said that too!
Girl 1: [stabs Girl 2] THERE CAN BE ONLY ONE.
Western Animation
Pinkie Pie: Whoever wins will be dubbed the ultimate super duper party pony, and headline the Rainbow Dash Birth-iversary Bash!
Twilight Sparkle: And the loser?
Pinkie Pie: Doesn't!
Twilight Sparkle: And the loser?
Pinkie Pie: Doesn't!
"That's all just well enough, because in reality there is only room enough in this world for one Mojo Jojo. One shall be the number of Mojo Jojos in the world, and the number of Mojo Jojos in the world shall be one. Two Mojo Jojos is too many, and three is right out. So the only Mojo Jojo there is room for in the world shall be me."
— Mojo Jojo, The Powerpuff Girls (1998), "Los Dos Mojos"
