The gang meets up with Horn who lost his pirate ship mysteriously one night! Also, they hear about the legend of a phantom ship in these parts of the ocean. So they decided to help find Horn's ship.
Pink Jam and the Jells have changed their ways but are still failures in whatever they do. Incidentally, the gang meets up with them but they don't realize it as they concealed their baddies' crest.
In the Winner's Cup held in a town by the seaside, Mocchi's partner has to be Golem who is the only 1 in the 5 IMA designated monsters that is with the gang. It will be 2 rounds of 1 on 1 battles.
Wood Golem attacks while Genki is busy creating battle plans; Genki awakens and finds Allan.
The gang tries to cross the marshlands but has problems with getting a taxi; Sandra makes and offer.
In this competition (3 rounds, 1 on 1), Mocchi must enter with two other monsters in the list that is designated by the IMA. Only Golem and Suezo qualify. While Golem is fine, Suezo is terrified.
Fed up with their failures, General Durahan sends out his Jelly Gaboos to deal with the gang. The Jelly Gaboos caught up with the gang who found themselves on a deserted sea platform.
The gang becomes increasingly curious about Hare's baggage but Hare refuses to show them.
Tiger wants to make his debut at the Mandy Cup, but everyone is worried that he won't be able to as he has forgotten his abilities.
While Mocchi is searching for food, he chances upon the Wondar Brothers.
The gang runs into Hare at an orchard and finds out that he has been living with Tama who saved Hare after the battle with Moo.
Genki and Mocchi take part in the first part of the competition that leads to the Legend Cup.
Holly is determined to free her father from the disk and trap Moo inside. The three enter a city to eat and while they are there, they see Poritoka and Most in the Legend Cup competition.
A year has passed since the final battle with Moo, but Genki still cannot forget his friends. Suddenly he is led by an image of Mocchi to a deserted shop with a Monster Rancher game disk.
Moo is so berserk that he has even started to destroy the Baddie armies. He then travels to Mt. Kyrus to destroy the volcano. The magma, Monol tells them, will cause a chain reaction inside the planet and cause a catastrophic earthquake.
Genki and the others attempt to lead Moo away from the Phoenix, when Pixie and an army of the Pirate Dragon army, led by Vulcan. Pixie is seriously hurt while fighting. But instead of finishing them off, Moo goes berserk.
The group travels north, and comes across a village of Jill. Jill tells them of the legend of Cinderbird, who changed the evil Skullcapt into a regular Jill. Jill decides that Genki and his friends have true souls of goodness.
When Lilim returns, she tells Durahan that she would rather give the Magic Stone to Moo. All of Durahan's forces have turned on him, and to make matters worse, Genki and his friends teleport to Durahan's warship. Lilim gets away with the Magic Stone.
Captain Weed realizes that Moo's body needs the Magic Stone to perfect it.
Durahan sends Renocraft to destroy the group, but they succeed in turning him into a lost disk.