Monster Rancher - Season 1 (1999)

Genki and his friends encounter Alan, a young boy who is strict and cruel to his pet Worm. When he tries to ally with agents of Moo, however, he learns that loyalty is something that is given and not taken.

Genki and his friends come across a group of bandits in the desert, led by Tiger of the Wind. He steals the Magic Stone, but the Baddies turn all of his friends into Mystery Disks and injure him. When Genki and his friends save him, he helps them defeat Captain Dino and then joins them.

Genki and his friends reach a town with a giant coliseum! Tiger battles Hare, who cheats his way to a victory. Genki and the others soon forgive him and Hare offers to buy them dinner and a place to stay the night. In the morning, Hare runs off and leaves them the bill, but Tiger catches up and makes him pay. Hare apologizes, and joins the group.

Continuing on their journey, Genki and the others arrive at a village close to a dam. With evil Hares attacking the dam, can Genki and friends stop Moo's minions before they flood the village below?

Stuck under a bridge while waiting out a heavy rainstorm, Holly tells the others of her past.

Arriving at what seems to be a bottomless pit called "Heaven Canyon", Genki and the others meet Ed, the pilot of the "Iron Bird" flying machine.

Continuing their journey in the "Iron Bird", Genki and the others arrive on the other side of "Heaven's Canyon" only to soon after encounter baddie Pixie and her minions.

Genki and Mocchi must try to save Holly and the others from Pixie's enslavement, leading to a battle between Genki's team and Pixie's.

Genki and the gang discover a Mystery Disc that unlocks a Monol. Monol proceeds to tell a story of the past; the creation of Moo and his defeat.

Before the gang can start a search for another Mystery Disk, Suezo sees Moo's castle off in the distance. Shortly after, they have their first confrontation with Moo which results in Holly's abduction.

With the help of Vulcan and the Pirate Dragons, Genki and the gang head toward Moo's Castle to attempt to save Holly. Meanwhile, Moo tries to convince Holly that he is her father.

Holly's Magic Stone points Genki and the others across ocean. When looking for a ship to cross it, they encounter baddie Gali's Zuum troops and Horn the Righteous Pirate.

Aboard Horn's ship, our heroes travel across the ocean, much to Golem's dismay. Soon after, they are attacked by more of Moo's baddies, the Zillas and their leader, Guji.

Now back on land, the gang continue their search for The Phoenix. At Hare's urging, Genki and company enter a cave they think to be a shortcut. Meanwhile, Tiger and Hare's rivalry reaches a boil, and Joker, one of Gali's minions shows up.

Continuing on their journey, Genki and the others find parts to a Henger and discover a seemingly abandoned city.

Suezo has always been happy to let others do the fighting for him. But, his friends have begun to take him for granted, and when Hare points out that he has no Special Attack, Suezo takes the criticism pretty hard. Genki begins to try and train him, but does Suezo have the courage it takes to show what he can really do?

Pixie returns, and helps Genki in a battle against a group of Scale Jells. But she and Genki become separated from the others, and when Pixie gets injured, she finds she must rely on Genki to survive. At first, she is embarrassed and angry. But Genki's compassion begins to wear away at the barrier of hatred she has built around herself.

The Searchers finally confront Gali, the second of Moo's Big Four. Gali is both charming and clever, and manages to trap Genki and the others in a pit. But Mocchi escapes the trap, and the young monster must fight, alone, in order to save his friends.

The Searchers are attacked by the Black Worms, who are under Gray Wolf's command. Tiger must save the group and come over the realization that he must be the one to defeat his brother.

While wandering through a hude, dark forest, the Searchers are captured by a group of Moks, led by their captain, a dark Mok named Ebony. Mocchi manages to escape, and befriends a Ducken, who had been hiding in the forest from the Moks. Can Mocchi save Genki and the others or will his efforts get his new friend captured as well?

The Searchers come across a small, quiet lake in the forest. They decide to restock their food supplies with fish. However, the lake has another inhabitant, an Undine. Golem falls in love with the beautiful water spirit, but she turns out to be a servant of Moo. Will he be able to defeat her?

When Genki and his friends are chased into an Arena by an army of Salamanders, they are challenged to three separate duels by the powerful Warriors Celius, Dragoon and Centaur, who all have strength to match that of Grey Wolf. If they win two of their battles they will be granted passage forwards, but if they lose two of their battles then they will be handed over to Moo.

While running from a squad of creatures called JaggerNauts, Genki and the others stumble across a factory. However, an android, Melcarba, is still lying dormant in the factory for millions of years and kills all of the JaggerNauts. Then it turns on the Searchers, and they have to use the lightning storm to shut down the derranged cyborg.