In recounting both of its predecessors, the Third Children's League is shaping up to be much like the first. Like it, the Third Children's League was brought together by happenstance rather than through a calculated initiative sponsored by a government institution like the Second Children's League was. Similarly, it wasn't focused on defeating a specific threat like supervillains or alien invaders. Instead, the Third Children's League was chiefly a small-scale grouping of allies, or more appropriately friends, who routinely banded together to handle threats they thought were too dangerous to attempt alone. That said, the League did have a common adversary in the form of enemies who came from different dimensions or whose abilities were magical in nature.

In fact, reacting to a magical threat is what brought them together in the first place as all three of the "pairs" which would make up the Third Children League were attacked by an omnipotent trickster known only as Uncle Grandpa. If that name sounds familiar to any KND operatives reading this than you'll likely know that Uncle Grandpa is an insidious, and annoying, extradimensional menace whose attempts to "help" various Sectors has caused the KND nothing but trouble. The creature tried to provide the same help to the future League members, prompting them to at first individually seek a method of preventing him continuously intruding on their lives. Eventually their separate investigations brought them together and they succeeded in motivating the trickster to "easy up" on attempts to help children everywhere. Afterwards they kept in contact with each and after a few more teamups decided to create a continuous association. The members of this League were;

Steven Universe: Born from a human father and an alien mother, this young boy was a member of the Crystal Gems, a team of alien rebels who fought in an ancient rebellion that sought to protect the Earth from exploitation from their own people. While the knowledge of knowing the tragic circumstances of his birth, and the danger of the Great Diamond Authority, weighed heavily on his mind, Steven was known to be a remarkably cheerful and optimistic person, who possessed an abundance of empathy for everyone, including his enemies. While this wealth of empathy was arguably his greatest attribute, Steven also possessed various magical abilities due to his half-alien biology, being able to not only materialize a shield, but also create protective bubbles, heal people with his salvia and tears, and a host of other powers.

Connie Maheswaran: A close friend to Steven, Connie had become involved with his adventures in Beach City after a mishap with him almost caused them to be lost in the depths of the ocean. Unperturbed by that chain of events Connie ended becoming Steven's sworn shield, learning dueling from one of the Crystal Gems and becoming a prodigious swordswoman in her own right. Despite not being a supergenius like Dexter or Jimmy, Connie was noted to have been a highly intelligent and imaginative individual who used both those traits to defend Steven and her follow League members.

Mason "Dipper" Pines: Along with his twin sister, Mason Pines, more commonly referred as Dipper due to a unique birthmark, had spent the summer of 2012 in Gravity Falls, Oregon, an infamous paranormal hotspot where he encountered several oddities and creatures, and even defeated a transdimenional demon that almost consumed the world. While many of his exploits in Gravity Falls were horrifying and grandiose Dipper was a relatively reserved individual who only sometimes unleashed his adventurous spirit. Incredibly curious by nature, and endowed by with a gift for problem-solving and cryptography, Dipper acted as the League's resident researcher when it came to cryptozoology, ufology, paraphysics and various other obscure subjects that were sometimes outside his teammate's purview.

Mabel Pines: The other half of the Pines Twins, Mabel was in many ways her brother's opposite if our reports can be believed. She was very open with others and was decidedly an extrovert who possessed an optimistic outlook on life that could be awe-inspiring. Like her brother, she spent the summer of 2012 investigating and combating the strange phenomenon that was omnipresent in Gravity Falls, though our files on these events highlight that she didn't always take these threats as seriously as her brother. This apparently was not much of a flaw since Mabel's free-spirited personality was actually quite helpful when it came to motivating her teammates to succeed when situations were particularly dire.

Marco Ubaldo Diaz: Similarly to Connie, Marco was a sworn sword and knight in Princess Butterfly's service. Originally from Echo Creek, California, Marco was a rather average teenager who was widely ridiculed as his school for being the "safe kid," someone who was overly cautious and rarely took risks. That changed when he meet Star Butterfly and went on several adventures with her eventually becoming her best friend on Earth. By our account these events must have severely changed Marco as witness accounts describe him as a brave and outgoing member of the League who nevertheless was quite organized and mindful of potential dangers during missions. In his training as Star's knight Marco leaned to be a talented swordsman and was quite proficient in unarmed martial arts. Both of these skills came in hand frequently during his time in the League.

Star Butterfly: The heir apparent to the magical kingdom of Mewni, an another dimension populated by human-like "Mewman" and various tribes of monsters, Star Butterfly had come to our world to learn how to use powers her responsibly. It was there she first meet Marco and started her adventures, juggling school, her responsibilities as a princess and various villains that wanted to steal her family's magical wand. Like Mabel and Steven, it seems like Star was enthusiastic and happy-go person who seemed particularly excited about learning about Earth culture and norms. This exploratory spirit, along with her magical wand, would be highly useful during her time with the League.

While the Third Children's League went on adventures where they clashed with villains and monsters like the previous two did, it already has managed itself distinct by being even more "loose" than the First Children's League. While the first was an alliance of young scientists who infrequently studied strange phenomenon together and the second was a government superhero team, the third was, and still is, kept together not necessarily by a collective interest like the first was or a longstanding mission like the second, but rather by the comradery between all six members.

While they started off in pairs more connections between the team developed quickly. Steven and Mabel were perhaps the most energetic and shamelessly optimistic members of the League and were quickly able to bond over that fact and their shared love of the show Crying Breakfast Friends. Marco and Connie on the other hand were said to have become sparring partners after they both learned that the other was highly skilled in swordsmanship. While Marco was initially nervous about practicing with a "little kid," Connie's obvious proficiency, and the reality that he was only two years older than her, made him reconsider. The two were noted to have traded techniques and advice with another and together even managed to create a new martial art that blended the knightly tactics of Mewni with the alien techniques of the Gem Homeworld. Lastly, and perhaps most surprisingly, Star and Dipper got along quite well if our witness accounts can be believed. While there was technically no formal leader of the League, it seems that Dipper and Star were the ones who typically end up in that role when it was necessary during an adventure, with Steven sometimes doing so as well but less frequently than the aforementioned two. With this being the case, it seems that Star and Dipper's friendship was centered on their responsibilities and struggle with them instead of a common interest. Also, while obviously a contentious rumor, it has been said that Dipper may have had a crush on Star. With little evidence to substantiate this claim we must consider this gossip.

Although we have no sources that can definitely confirm why they picked it, we do know that the Third Children's League called their group the the Adventure League. This League's most notable adventures were;

- Travelling to Herkleston, Maryland using a warp pad, the League tried to track down an elusive corrupted gem that had found its way to the town's nearby creek and had already kidnapped several of the children that frequented it. While they initially found themselves lost in the massive creek with the help of a trio of local kids they were able to navigate their way through to the creek's heart and bubble the spider-like creature, saving everyone it had taken in the process. Impressed by one the trio's aspirations of knighthood, Marco and Connie would routinely return to Herkleston give her lessons in swordsmanship.

- Running into the mad scientist and extradimensional terrorist Rick Sanchez on several occasions. The first time the League encountered him they attempted to apprehend him for the murder of King Jellybean, a principal ally of the Kingdom of Mewni, only for Sanchez to reveal the revolting truth of the king. Still, given the mad man's habit of causing chaos and death across the multiverse the League tended to fight him as much as they allied with him to confront larger threats.

- Saving the Teen Titans and all of Jump City from a stupefying enhancement cast by the villain Allegro, a transdimensional creature who had long kept the heroes under his magical thrall, turning them into childish parodies of their heroic selves. Before the League could confront Allegro himself they had to fight off the enchanted Titans who under the effects of the spell believed the League wanted to "take away their spotlight." Through the combined efforts of Steven's empathetic abilities and Star's own magical powers the Titans were momentarily returned to their former selves. Together the two groups of heroes were able to banish Allegro to the collapsing Nightmare Realm and permanently free Jump City from his magic.

- When the renowned child prodigy Lisa Loud accidentally transported her large family into the Land of Ooo due to a malfunction of her experimental time machine the Adventure League were the ones who came to their rescue. Since the family had been scattered across the world of Ooo the Adventure League were initially at a loss when it came to finding them all. Fortunately, a long time adventurer and hero of Ooo and his mutant dog were able to help the League find the lost family before they were killed by the many threats that inhabited the post-apocalyptic landscape of Ooo.

- Star invited her other League members to a royal ball in Mewni only for them to have to rescue princesses Sofia of Enchancia and Elena of Avalor from the insane Miss Heinous, who kidnapped the young princesses in a scheme to recreate her Reform School for Wayward Princesses. The rescue was going well until Miss Heinous in desperation used her dimensional scissors to unleash the witch Mother Mae-Eye from her magical imprisonment. The entire Adventure League almost ended up being baked in the witch's pies but were saved when Dipper and Connie, the only ones still standing at that point, managed to figure how to reflect the witch's own magic back at her, freeing their teammates and sending the witch back to "Pie World."

- Meeting both of their predecessors when they learned from the resurrected Time Baby that one of their frequent enemies, the insane time traveler Randall Ross, had joined forces with villain Warp in a bid to completely destroy all of time. The Adventure League helped bring about the defeat of the two villains by not only rescuing the Teen Team form the dystopian futures they had been trapped in but also by defending the Science Club from hordes of enslaved reality-devouring Langoliers as the young scientists worked to deactivate a modified reality bomb created by Ross that would have destroyed all of time.

- Another run in with the Loud family saw the Adventure League perform an exorcism on Lucy Loud, who had inadvertently cast a real spell that allowed her to become possessed by the fragmented spirit of Bill Cipher. Fortunately, the team was able to successfully exorcise the dream demon and prevent him from fully resurrecting himself by attacking him in the physical world while the Loud siblings helped their sister fight off Bill's influence in the mindscape.

- Frequently assisting the infamous space pirate and freedom fighter Captain Lars and his crew of renegade Gems in their attacks against the Great Diamond Authority, a rising totalitarian power in the galaxy since other rival empires like the Cluster Singularity, Yokian Theocracy, and Irken, Empire had exhausted themselves fighting one another after their alliance collapsed after the Second Big Teamup. Along with Captain Lars, the League would join forces with former Teen Team members X-J9 and Jupiter Lee and assist their organizations in combatting the forces of the Gem Homeworld. Their most notable accomplishment during these teamups being the liberation of Terradino, a planet marked for colonization by Yellow Diamond herself. During one these outer space excursions the Adventure League also ran afoul of the Galactic Federation, a seemingly benign galactic power that in truth was just as totalitarian as the Great Diamond Authority, if not more so. While the Adventure League preferred to work with the forces of the Star League or the Vindicators whenever they fought against the Galactic Federation circumstances would sometimes force them to work alongside Rick Sanchez. These alliances were seldom wholesome or cooperative and it is said that even Mabel and Steven found Sanchez to be irredeemable in his actions.

As the Adventure League at the time of this writing is still active, this chronicle will not discuss their disbandment or current whereabouts, but instead their uniqueness compared to the other Children's Leagues.

While the Science Club were obviously notable for their achievements in scientific exploration and discovery and the Teen Team remarkable for the sear volume of heroic acts and world-saving missions it undertook for the Global Justice Network, the Adventure League does manage to stand out from its predecessors in that the group managed to be successful as a League despite most its members being unpowered by any kind of supernatural or technological advantage. While our 2x4 technology is highly advanced the fact remains that most Operatives of our organization are simply children trying to make a difference in the world without the benefit of powers to assist them in that worthy endeavor. Thus, the Adventure League serves as a perfect example of what can be accomplished when teamwork and comradery are used to compensate for a lack of power.

And with that, I Numbuh 94 of the Kids Next Door once again hope that the Operatives who read of the adventures of these three Children's Leagues will be inspired by their acts of heroism and learn from their strengths, weaknesses, accomplishments and failures.