Capture Balls

"You think I have better things to do than sitting here, trying to cram a 6-foot tall bird into something the size of a baseball?"

— Chuggaaconroy, Pokémon FireRed

Capturing a living creature inside a portable container. These capsules are a staple of the Creature Collector genre, as they facilitate the primary gameplay loop of capturing and carrying wild Mon. Nearly all Phonýmon series have some equivalent of them as a direct Homage to the Trope Codifier, Poké Balls.

Often they become a rudimentary type of Summon Magic, which enables you to release and recall a summon from the portable storage device at will. This may also come with some form of magical domestication to make the creature obey their owner post-capture (although this can blur into Slave Mooks and Evil Poacher territory depending on the tone). Some Mons even come pre-installed with a "capture ball state" as part of their biology, as if they were designed for it, skipping the "capture" part altogether.

Capture Balls needn't always be used for summoning however, and may just function as a portable Prison Dimension. This is favored in series with regular Monster of the Week, as capture can wrap up the threat, without having to worry about the logistics of containment. Typically you can only capture severely weakened or defeated opponents in this manner, to prevent it from instantly nullifying all threat.

The mechanics of how the device capture itself works can vary. It might convert the creature into light, shrink them, or just be Bigger on the Inside. This naturally comes with some And I Must Scream implications if the creature remains sentient while caught, although in more lighthearted settings they may just be Un-Paused upon release. Beings within a Capture Ball typically don't need to eat, drink, sleep, or breathe, which makes them very convenient for keeping large numbers of creatures without spending most of one's time taking care of them.

Capture Balls tend to be spherical as this allows them to be thrown at opponents more naturally. Some creatures may be able to parry or resist these balls—and extremely powerful beings might even shatter them.

In relationship to Sealed Index in a Can, these could be considered a type of handheld can. Sister trope to Genie in a Bottle, which describes a different genre of can.

Compare Supernatural Sealing, Captured Super-Entity, Weapons That Suck and Bag of Holding. See also The Collector. A subtrope of Mon Tech.

---

Examples:

Animation

• Parodied in Happy Heroes; in Season 10 Episode 23, Smart S. uses what is blatantly a Poké Ball not to capture a monster in the first level of the game the Supermen are trapped in, but to feed it Sweet S.'s abysmal cooking.
• Pleasant Goat and Big Big Wolf: In The Athletic Carousel episode 55, Mr. Slowy summons a pitchfork-wielding bee from a ball clearly meant to be a Pokéball to give Weslie a boost into the air.

Anime & Manga

• Cardcaptor Sakura: Sakura accidentally releases several creatures/spirits sealed inside cards, and has the ability to seal them back into their card form. Other characters like Li/Syaoran can still use the cards however, and and any magical tool created by Clow Reed (who captured the creatures/spirits in the first place) can manipulate the cards.
• My Hero Academia: Mr. Compress has this as a superpower, being able to seal anyone he touches into tiny portable marbles that he can release at will.

Literature

• Arifureta: From Commonplace to World's Strongest: In volume 11, Hajime crafts Suzu Taniguchi several artifacts to store and summon her monster familiars. He introduces them as "Monster Orbs", but can't help thinking of them as Poké Balls.
• Mother of Learning: Zorian warns Enthusiastic Seeker of Novelty away from inspecting the metal sphere on his table, since it's specifically designed to seize a giant spider and pull it into a pocket dimension, like a portable prison. It wasn't intended for Novelty, but would likely work on her. He pulls it out at the final battle to unleash its occupant, a mage-killing grey hunter, which kills the clone of Silverlake.

Live-Action TV

• Kamen Rider Gotchard: Chemies are sealed into Chemy Cards, allowing alchemists to harness their power.
• Power Rangers S.P.D.: Unlike their Sentai counterparts who just execute their villains outright, the Rangers of Space Patrol Delta imprison them in Containment Cards after defeat.
• Ultra Series:
  • In Ultraseven, the titular Ultra has a pack of Ultra-capsules which can summon a kaiju when thrown (and recalled on command). Despite Ultraseven owning at least 5 capsules, we only see three of the kaiju throughout the series — an avian mecha named Windam, a ceratopsian dinosaur named Agira, and a buffalo-amphibian hybrid named Miclas. Said show pre-dates Pokémon by three decades, and is allegedly one of the inspirations behind the concept of Poké Balls.
  • Ultraman Leo, where Ultraseven returns as a supporting character, but without his kaiju capsules until a later episode guest-starring Ultraman Jack has the Ultra delivering a new capsule-summoned monster, Sevengar. Which turns out to be Awesome, but Impractical — Sevengar is powerful enough to deliver a Curb-Stomp Battle to the Monster of the Week, but only lasts for one minute and needs to be recalled into its capsule to be recharged for 50 hours.
  • Ultraman Mebius has the defense team, GUYS, re-creating the effects of Ultraseven's kaiju capsules after 4 decades, where they managed to recreate digital clones of previous Capsule kaiju Miclas and Windam, and summon them from miniaturized capsules to help out in fighting whatever Monster of the Week in any episode.
  • In the franchise spinoff Ultra Galaxy Mega Monster Battle, individuals called Reiyonixes are granted control of kaiju, which they can capture in digital devices called Battlenizers and summon them in combat. Most of the series revolves around a human Reiyonix named Rei with three different monsters in his command, though the show averts Gotta Catch 'Em All since Battlenizers can only store three kaiju maximum, with Rei sticking to three monsters (Gomora, Litra, Eleking — Eleking replaced by Miclas after becoming a Sacrificial Lion in the second season) for the entire series.
  • Ultraman Ginga, in a way, does this to the Ultramen, courtesy of being subjected to Toy Transmutation during the Multiversal Dark Spark War. Various Ultramen (including the titular hero) and kaiju are stuck as action figures, but can be collected and summoned by humans to regain their giant forms.

Tabletop Games

• Smash Up: The Itty Critter's Phonýmon deck features the card "Critter Cube", as their Poké Ball expy. It lets you take one of your opponents weaker minions and shuffle it into your deck.
• Warhammer 40,000: The Necrons were retconned as having overthrown their C'tan masters and instead captured them in Tesseract Labyrinths (fist-sized cubes that are the physical manifestation of the pocket dimension serving as their prison), unleashing them on the battlefield (earning the nickname of "Pokeballs" by players). They're also implied to have sold some to the Grey Knights as daemon-containment devices, before the rest of the Imperium ended up at war with them, making further such trades impossible.

Video Games

• The Binding of Isaac: Afterbirth adds an item called the "Friendly Ball," It's a blatant Poké Ball expy. You can throw it at an enemy and release it later on as a charmed enemy. There's even a challenge in Afterbirth+ where you get a Friendly Ball that always has an enemy inside it.
• Borderlands: The Pre-Sequel!: Sterwin's quest where he assigns the player to capture Eridians using a grenade mod that functions like a Poké Ball (and looks like a Quick Ball.) You have to lower their health first and everything. The descriptions for the filled balls are also full of references to Pokémon. The mission completion text points out how you were the best, like no one ever was.
  "Congratulations, OPHA was caught! Want to give it a nickname or something?"
• Coromon: This poke-clone introduces Spinners, which are short cylinders that are used to capture mons in the game. They are about as small in radius as the smallest Mons, although mons can get much bigger.
• Elona has monster balls, which can be used to capture monsters when they're at low health and their level is equal to or lesser than the ball's level.
• G-Darius has an ability called the Capture Ball, but it's a subversion of this trope as these balls simply turn the enemies they hit over to the player's side by attaching onto them, instead of sending them inside.
• Genshin Impact: During the mid game you gain access to the Omni-Ubiquity Net, which is a spherical device that you can throw at wild animals to capture their essence, and place them inside your Serenity Pot.
• Honkai: Star Rail: As part of their Phonýmon parody, the "Aetherium Wars" game involves capturing "Aether Spirits" (live holograms of various overworld enemies) with a disc-shaped device called "Aether Coins". When you want to capture a wandering Aether Spirit, you point the Aether Coin towards them, which will emit light that hits them and initiates battle; after you win the battle against them, they'll be "captured" in the coin.
• Jade Cocoon: In the first game, Cocoon Masters trap wild Mons inside silk cocoons as part of the process of taming them. Playing Magic Music on a musical instrument during the capture calms the beast enough for the cocoon to seal it, then a Nagi shaman can purify the cocoon of evil and make the beast inside a loyal servant of the cocoon master.
• Palworld: Pal Spheres are used to capture Mons at low HP. They even work on human NPCs, although this is considered an illegal practice In-Universe. The spheres seem to have some sort of magical domestication power (bordering on enslavement), as the pals and people you capture will obey your commands even if it makes them miserable (though there is a mechanic where they may refuse to work if treated poorly enough).
• Pokémon: Poké Balls are technology that can be thrown at Mons to seal them, with the capture chance going up as you lower their HP. There are a variety of Poké Balls that increase the capture chance, up to the Master Ball which is guaranteed (as long as the Pokémon is not knocked unconscious). Being captured does not necessarily mean that the Pokémon will obey its owner, however. Further, it is typically shown that after capture a Pokémon can leave its ball at will. Most simply refrain from doing this out of respect for the trainer and/or due to the Poké Ball being very comfortable. Contrary to what was long popularly believed among fans, a Poké Ball does not turn the Pokémon into energy nor does it have the power to shrink them, but rather it encourages a reflexive power all Pokémon have to shrink to a tiny size. Their invention marked a big turning point in the world's history, as it allowed far more humans to live closely with and have their own Pokémon than ever before.
• In the Raidou Kuzunoha duology, demons are stored in special Confinement Tubes. In the first game, they're added to your party by stunning them with one of their weaknesses, then repeatedly mashing the Circle button close to them until the Confinement gauge is empty, while in the second game, they presumably enter the tube willingly after a successful negotiation.
• Sonic Adventure 2: In the first stage of the Hero story, City Escape, there's a room that holds the Magic Hands upgrade. Sonic is unable to access this room until after he gets both the Bounce Bracelet and the Flame Ring from later stages, as they are used to destroy the steel crates that keep the room closed. When Sonic does get the Magic Hands, he can use them when he's near an enemy to trap it in a small ball. He can then throw this ball at another enemy to destroy it.
• In Starbound, you can throw capture pods to trap any monster that has been sufficiently weakened. Once captured, these monsters can then be unleashed to fight on the player's behalf.
• Tamagotchi: In the first game, Tamagatchi are alien immigrant Mons who can't survive on earth, and thus were put inside electronic egg shaped terrariums for people to take care of them.
• Temtem: Temtem can be captured in TemCards, which show the Tem inside on a translucent screen and fold up into a square. According to some NPCs, Tems are converted into data.
• World of Final Fantasy: In this spin-off of Final Fantasy, Prisms are cube-like objects that used by the player to imprism strange creatures known as mirages.

Western Animation

• Ben 10: In the future shown in "Ken 10", Ben captures defeated enemies inside thrown "Null Void Containment Eggs" until he can release them into the Null Void.
• Johnny Test: In "Johnny'mon", it's shown that Tiny'mon are kept inside boxes as opposed to balls.
• Lilo & Stitch: The Series: Played With. All the series alien experiments by default are contained in small dehydrated marbles that activate after getting wet. While usually Lilo tries to find the experiment a job they can do while awakened, for a select few she resorts to dehydration to seal them back into their pod form (such as 627 who was designed to be irredeemable).
• Samurai Jack: Demongo captures the essence of defeated warriors inside of skulls, which he stores on his body as potential summons. After a released warrior is defeated their essence automatically returns to the skull, ready to be released again fully healed.
• In Steven Universe this is a 2 step procedure. First, Corrupted Gem Monsters automatically revert to a small gemstone form after being defeated. Then, other characters can quickly capture the gem inside a small containment bubble so they can't reform.
• Yin Yang Yo!: Smoke and her brother Mirrors are anime-esque villains who use magical prisms to capture anyone they throw them at. The Woo Foo siblings were captured by those characters for a battle against each other.

---