Pet bonding is the dungeon process that makes a pet-class creature the recognized companion of a crawler. A crawler can possess, feed, transport, or train such a creature before the bond exists; those acts alone do not give it bonded status. The distinction first becomes urgent when Princess Donut chooses the Mongoliensis later called Mongo on the Second Floor. Mongo remains hostile after leaving his cage and accepts food without becoming Donut's pet. Much later, Carl bonds with the Tummy Acher formerly known as Garret, showing that the path to a bond differs between creatures and that some bonds can be lost and made again. The dungeon recognizes the completed relationship through its interface, while the creature's conduct still requires attention and training.
Choosing a creature is not bonding it
Donut encounters Mongo in the kobold fighting pits after Carl obtains the Master Pen Key. The key can open only one cage for a non-kobold user, making the choice of creature consequential. Mongo is a small, red-tagged juvenile with a beak full of teeth, and his description calls him a pet-class mob that has not bonded with a crawler. Donut chooses him despite Carl's preference for a less troublesome option. This gives them custody of Mongo, but it leaves his hostility intact. The dungeon does not treat the reward-room choice as an automatic transfer of loyalty.
Even a pet biscuit fails to change Mongo's status at this point. A forcefield prevents Carl from feeding him while the cage is closed. After Carl opens it and restrains the struggling dinosaur, Donut puts biscuits in front of him. Mongo eats, but his map dot remains red, and he bites Donut on the nose. The immediate effect of food is a pause in his attack, not a bond. Donut calls him Mongo before the system offers an official naming menu, another sign that her personal attachment and the game's designation are separate things.
The distinction has a practical cost. Carl uses a small gerbil cage to carry Mongo into Mordecai's safe room because Mongo tries to bite when held directly. The cage keeps him contained, although he can still snap at anyone who comes too close. When Mongo attacks from inside it, he teleports away; Donut and Carl have to find him crying in a corridor. He runs toward Donut when she appears and then bites her again. Seeking her company therefore cannot yet be taken as evidence that his hostility has ended, much less that the pet bond has formed.
Hostility and the white map dot
Mordecai identifies the first mechanical barrier: a creature with active aggression toward the crawlers cannot be bonded. He directs Carl and Donut to return after Mongo's map dot changes to white. Carl compares this with his earlier encounter with danger dingoes, whose hostility he removed by feeding them. The comparison establishes that hostility can change without the creature becoming a permanent pet. Carl's achievement for the dingoes recognizes their subsequent help against other enemies; it does not identify them as bonded companions.
Mongo's change comes through hunting with Donut. Carl learns from a broadcast that Mongoliensis are pack hunters and sets up a fight with a brindle grub. Mongo rushes the grub but does little damage. Donut uses her own claws to open the creature's underside, allowing Mongo to eat it. They find more grubs, and Mongo starts using the hooked claw on his foot to make a kill himself. After the third grub in this effort, his dot changes from red to white. The sequence connects the reduction in hostility to shared predatory activity with Donut rather than to a single biscuit or a command from the dungeon.
White does not mean bonded. Mongo follows Carl and Donut afterward and attacks them less, but he can still lash out, and Carl returns him to the cage near unfamiliar mobs. He remains level one even after they kill further grubs. Mordecai confirms that they are moving in the right direction but says the bond must be finished before the Second Floor collapses if they want to take Mongo downstairs. A white dot has removed the first obstacle; it has not secured transport to the next floor or unlocked pet progression.
Progression and limits before the bond
Mordecai explains why Mongo has not gained a level. A mob that begins as pet-class starts at level one whether obtained from a treasure room or purchased, and it stays there until bonding. Once bonded, it can gain experience and grow physically as it levels. Mongo's species description anticipates a fully grown body at level fifteen, although Mordecai clarifies that physical growth stopping there does not end the pet's ability to gain levels. The delay matters because Carl and Donut are exposing a fragile, inexperienced creature to Second Floor monsters while the clock is running down.
Carl also asks whether a crawler may keep more than one pet. Mordecai gives a qualified answer: generally no, but race, class, unusually high charisma, and the kind of pet can change the limit. He distinguishes dungeon familiars from pets that have crawler IDs. His examples include Lucia Mar's dogs and a crawler who entered with many goats. These examples explain why a count of animals accompanying someone cannot, by itself, reveal how many ordinary pet bonds that crawler has. Mordecai does not provide a single universal cap that applies to every crawler and creature.
Training while the bond is unfinished
Mongo's white dot allows Carl and Donut to work with him outside the cage more often, but it does not make him safe around other monsters. He is eager to charge any enemy, including opponents that could easily kill him. Mordecai warns that teaching restraint is as important as securing the bond: an uncontrolled pet can draw a powerful mob onto its handlers and ruin an attempt at stealth. Mongo demonstrates the problem by attacking Mordecai's leg and teleporting away again. Carl and Donut find him fighting a cow-tailed brindle grub he is not yet strong enough to defeat alone.
Donut and Carl then spend hours teaching simple commands. Mongo responds to calls to come, lie down, and attack, but holding him in place is harder. Pet biscuits work as training rewards because he is strongly motivated by food. After a day of practice he still reacts loudly to enemies, yet he waits more reliably for Donut's signal before charging. The command she uses to send him forward changes during the training, illustrating that they are building a working routine with this particular animal rather than activating a fixed dungeon control. The system has not declared a bond at this stage.
As the deadline approaches, Carl and Donut continue toward the stairwell while fighting brindled vespas. They use Carl's slingshot to bring individual flying enemies down and Donut's magic to weaken them, then allow Mongo to finish suitable targets. This gives him a role in their fights without simply releasing him against an untouched swarm. It also exposes the limit of their control: a badly wounded vespa still manages to seize Mongo and lift him toward its mouth. The training has made cooperation possible, but it has not removed the need for Donut and Carl to judge whether an enemy is truly disabled.
Donut rushes the vespa and kills it before it can swallow Mongo. Immediately afterward, Mongo's map dot turns orange. Donut receives a pet menu and can officially name him; the system announces that Mongo has joined the party as her pet and changes his title to Royal Steed. This is the first unambiguous confirmation of the completed bond. The timing links it to Donut's rescue, although the story does not state a universal rule that every pet must be saved from a predator. Mongo still bites Donut after the notification, demonstrating that recognized attachment is not the same thing as perfect obedience.
The loss of Garret's bond
The fate of another pet shows that bonding can be reversible under a creature's specific rules. Ren's companion Garret is a Tummy Acher, a pet whose body can regenerate after death if it is not destroyed. Ren tells Carl that each regeneration strengthens Garret but adds a weakness. Every fifth death resets him to level one and requires a new bond. Near the end of The Eye of the Bedlam Bride, with no route out available to her, Ren deliberately triggers that fifth death using a substance to which Garret is vulnerable. She gives the newly small, unnamed creature and his carrier to Carl so that he can survive with another handler.
Garret's reset is more than a change of owner on an existing pet menu. His name disappears, and Ren expects Carl to feed him until a new bond forms and then choose another name. She warns Carl about foods that would harm the creature and asks him to investigate his newly acquired weakness. Her instructions are specific to Garret's condition. They do not establish that feeding alone bonds every pet; Mongo had eaten biscuits while still hostile, remained unbonded after hunting grubs, and needed further experience with Donut before the system recognized him.
When Carl releases the Tummy Acher in This Inevitable Ruin, its description explicitly says that it is pet-class and currently unbonded. It also lists five previous deaths and explains the fifth-death reset, including the loss of memory and the need to bond and name the pet anew. The description attaches further risks to this species: a regenerated Tummy Acher gains a new weakness, and one that dies before reaching level five will not regenerate. Those are properties of the Tummy Acher, not general rules for every bonded animal. Carl's responsibility begins while the creature is still vulnerable and unrecognized by his pet interface.
Carl offers the small Tummy Acher food in a bowl. Ren had predicted several feedings, but this one meal is enough: its dot changes from white to orange and the system confirms that Carl has bonded with it. The interface opens a Bonded Pets tab, notes options connected with the guild's pet stable, and demands a name. Carl's party eventually settles on Sir Rendlegore, shortened to Rend, in memory of Ren. The new name records a new bond after Garret's reset; Carl's private knowledge of the animal's earlier life does not restore its former system identity.
What a completed bond changes
The two documented bonds show different routes to the same formal threshold. Mongo needs his aggression removed, time spent hunting and training beside Donut, and a final rescue before he receives an orange dot and party designation. Rend begins the later scene with a white dot and bonds with Carl after one feeding. The observed sequence supports creature-dependent bonding conditions, while leaving the dungeon's exact hidden test unspecified. Mordecai's limited guidance to Carl and Donut is consistent with that uncertainty: he can identify prerequisites and confirm progress without telling them precisely which future act will complete Mongo's bond.
Completion also changes what the crawlers can plan around. Mongo becomes a party member and can finally begin the pet-class progression Mordecai described; a future pet carrier becomes useful because a bonded pet can be stored in inventory without being harmed. Carl receives a dedicated Bonded Pets tab after Rend's bond, with additional options because his guild has a pet stable. Neither interface change erases the animal's behavior or its particular vulnerabilities. Mongo still needs restraint around enemies, and Rend's regeneration weaknesses still demand careful feeding and protection. Bonding makes the relationship legible to the dungeon; keeping the creature alive remains the handler's work.