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 rigs it to explode, and she gets away with the Magic Stone. Genki and his friends confront Durahan and defeat him. Then they escape from the Iron Bird before it explodes, with Durahan onboard.
While Mocchi is searching for food, he chance upon the Wondar Brothers. The younger Wondar is a huge Hare Type monster with immense strength while the elder Wondar is good with his brains. Mocchi brought them and their gift of gigantic potatoes back to the gang. Just as they were about to become good friends, the elder Wondar revealed that their goals clash, for he wants his younger brother to become the strongest monster there is! So they had a little sparring session and saw for themselves the immense potential of Mocchi and the younger Wondar, but most important of all, the great friendship between the two. Unknown to the rest, the younger of the brothers actually doesn't like to fight but wants to grow crops all his life but dare not speak up. Later, they part their ways but not before the elder Wondar added some sleeping powder to their stew. His aim is to take their Mystery Disc and hide it so he would not meet them in the next competition! When the Drill Tusks dispatched by General Durahan attacks, the gang finds the disc missing and this led the Drill Tusks to seek and attack the Wondar Brothers! How will it all turn out?!
Tiger wants to make his debut at the Mandy Cup but everyone is worried that he won't be able to do it without his abilities (which he has forgotten). Genki tried to teach Tiger some defensive moves but Tiger insists on continue practicing alone to receive his abilities. So, Genki and Tiger broke out into a fight and when they enter for the competition the next day, Tiger refuses to be coached by Genki. The competition format is 2 monsters per team and 1 on 1 battles. If there is a draw, a 1 on 1 Sudden Death round will be held determine the winner. Despite not having their more powerful moves, Tiger and Mocchi were able to win their rounds and made it to the finals. Their opponent is a mild looking boy who acts strangely innocent. Tiger took on a Snail named Knight Nighton but found that his attacks were all useless and lost badly as he could not defend himself. After a tough fight Mocchi defeated his opponent, a much larger Mocchi Type monster and brings the match to Sudden Death! With Mocchi too tired to continue, Tiger volunteers and decides to listen to Genki but will that be enough to win?
Fed up with their failures, General Durahan sends out his Shelly Gabus to deal with the gang. The Gabus caught up with the gang who found themselves on a deserted sea platform. After an intense battle, the Mystery Disc dropped into the ocean. As Mocchi and Genki searched, they encounter Professor Garnish's submarine. Garnish thought they are after his dream treasure (which is actually some sunken treasure of a pirate ship) and chased them away with his cannon. The gang came back after realizing that the only way to get the Mystery Disc back is to make peace and get Garnish to let them use the submarine. The professor is touched by Holly and decided to help them but not before they kept their side of the bargain which is to do anything for him (i.e. cleaning, cooking...)! Finally the professor, Genki and Mocchi departed. They found the Mystery Disc in an underwater cave which happens to contain the pirates' treasure! Just then, the Gabus attacked! Can they successfully bring back the Mystery Disc and what will happen to the pirates' treasure?
In this competition (3 rounds, 1 on 1), Mocchi must enter with two other monsters in the list that is designated by the IMA. Guess what? Only Golem and Suezo qualify! While Golem is fine, Suezo is terrified. Furthermore, there is only one other team in this championship! So the decided to win the first two rounds so Suezo does not have to fight! As they get ready, Suezo found himself helping a kid, Furred Suezo (to show him what bravery is all about) from another bunch of Suezo bullies who took his trading cards. Suezo decided to stand up for him and managed to get back the rare autographed Poritoka card but in the end the Suezo gang caught up and they were both beaten up really badly. Meanwhile, Golem managed to gain the upper hand against his opponent Cocken (Ducken Type) by using his Tornado attack. However, while Golem was thanking the crowd, Cocken sneaked up and pushed Golem out of the ring and winning the 1st round! In round 2, Mocchi defeated Gabu with Cherry Blossom Blizzard but Suezo still hasn't arrived at the stadium. If Suezo does not arrive, the judges will announce the other team winners by default. Finally the injured Suezo arrives, and found out that he will have to face a gigantic Whale Type monster! Not only is the championship at stake, so is his pride and the kid's cards, can Suezo win?
The gang tries to cross the marshlands but have problems with getting a cheap taxi. In the end they took Sandra's offer of 700 gold. The first half of the journey was a roller coaster ride with Golem barely hanging on! Halfway through the marshlands, Sandra suddenly stops and tells them that she is going back! It turns out that she is trying to rip them off since she knows they are loaded for their victory in the last competition is all over the news. She asks for 3000 more gold and they broke out into an argument. After failing to reach an agreement, Sandra threatens to leave them in the marshland. The gang decided to perform to get a price cut and in the end managed to resolve it for another 1000 gold against the backdrop of going deaf from Mocchi's singing. They set off for the second part of the journey and found themselves chased by Durawalls (think: Monol). Sandra's driving and the gang's fighting managed to get them to safety but Sandra still crashed the cab into a forest. Sandra is both injured and upset but Holly managed to cheer her up. With the Durawalls who have a clear advantage chasing them, will they make it out alive?
In the forest, Genki is busy with creating battle plans when Wood Golem attacks. No one listens to Genki's battle plans and Genki, Mocchi and Wood Golem falls into the river. When Genki awakens to find Allan and Mocchi beside him, together with Worms who saved him. It turns out that after Moo's defeat, Allan goes around searching for and unlocking Discs, then he finds them good homes and trainers. Genki is very touched by the change in Allan. Genki seems to be so confident in his battle plans but not in himself that Allan decides to show him a thing or two with a monster battle between Mocchi and small Worm. Despite Mocchi following Genki's best plans, they still lost to small Worm who surprising managed to make a last minute comeback. Allan tells Genki he cannot win unless he becomes true to himself, like he used to be and leaves. Genki is lost in thought not knowing why he lost, until he saw something Mocchi drew and finally understood the meaning behind Allan's words. The remainder of the gang where still searching for Genki and Mocchi when Wood Golem shows up. Since they don't stand a chance, will Genki arrive in time to save them and does he really have what it takes to win?
Pink Jam and the gels who 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). Just as things where going well, a fearsome trio of Jokers attacked! Can Pink Jam do anything about it and can these ex-Baddies be trusted?
When Mum Mew asks about his plans, General Durahan says that he has already found a very strong monster who can deal with the gang. As they signed up for the World Monster Cup, the gang realized that they don't have a partner for Mocchi that is in IMA's designated list so they went around only to encounter Naga of the Big Bad Four! Naga says that he has changed and has trained hard to regain his fighting skills and would like to help them out. Everyone but Suezo trusts him. Naga displays unbelievable fighting abilities but can he be trusted? And what's with this very strong monster General Durahan found?
Golem and gang runs into an Old Lady who cooks the best Pizza. Just when she was about to defend her crown in the cooking competition, her secret sauce is stolen! The ransom is Holly's Mystery Disc! Can they get the sauce back in time to help the old lady defend her crown?
An airplane lifts off from the crash site of General Durahan's ship. Genki and gang made it to the International Monster Association headquarters to register for the Legend Cup. During the conversation with the official, we discovered that Suezo does not know that Mocchi had to fight two monsters to win the Legend Cup. Everyone is surprised and taunts Suezo about it. Suezo felt embarrassed and tried to save his face by saying that he was just trying to make everyone relax. Later in the forest, Mocchi decides to battle Most last. This means that Mocchi will fight Poritoka first in tomorrow's Legend Cup. Everyone starts to think about how Mocchi is going to defeat Poritoka. Suezo volunteers to use himself as a practice opponent for Mocchi as he and Poritoka are of the same type. So Suezo and Mocchi prepares for battle. Suezo uses Tail Attack and Mocchi counters with Mocchi cannonball. This attack sends Suezo flying into the sky. While the gang searches for Suezo in the forest, they chance upon a giant mansion. After a while, Suezo joins them and Poritoka appears saying that this is one of his summerhouses and tells them to leave it immediately. When he learnt that Mocchi is his opponent, he laughs at them, saying that he will be no match for his Tail Attack. He continues to taunt them saying that Suezo does not have even a fraction of his power. Suezo gets ready to confront Poritoka but everyone turns and leaves. Suezo does not understand and ask them why didn't they feel angry with Poritoka. Then everyone shows their displeasure and wants to beat Poritoka even more than ever. Although they have never seen Poritoka in battle last year, they decided to prepare for Poritoka's fearsome Tail Attack by practicing. Suezo wanders off to "look for something" but made his way into Poritoka's mansion. He teleported in and wandered about the huge mansion, not knowing where to find Poritoka. He then sees a few Suezos gathering outside a door with a fainted Suezo. Suezo thinks that Poritoka is inside the door so he peeped in. Sure enough, Poritoka is practicing with other Suezos who are too terrified to move. Suddenly Poritoka appeared outside the door, behind Suezo and tells him that he will see better inside in the room. Suezo tries to teleport off but was held down by the other Suezos. Poritoka wants them to teach Suezo a lesson. Suezo managed to break free and dash towards Poritoka. Back in the forest, Mocchi will able to dodge everyone's attacks in the training and they are very hopeful that Mocchi can win tomorrow. Suddenly, Poritoka appears, holding a badly hurt Suezo. Everyone wants to beat Poritoka up but Genki tells them that they will settle it tomorrow. Suezo tells Holly that he has memorized Poritoka's Tail Attack before fainting. Later at night, Suezo woke up after smelling the stew. He runs towards them and appears to be suffering from amnesia. Then he snapped out of the daze and tells them that they have to start practicing to stand a chance of winning tomorrow, but first he will need to eat. Suezo lines Golem, Tiger and Hare up to fight Mocchi by emulating Poritoka's Tail Attack. Suezo tells Genki that he will show no mercy and the fight begins. Genki and Mocchi are quickly overwhelmed and laid hurt on the ground. Holly tells them to stop but no one listens as they all want Mocchi to win tomorrow, so Genki and Mocchi got up and they continued the training. The next day, we find Poison, Mum Mew and Goby sitting in the crowd at the stadium where the Legend Cup is held. They had at little squabble but were interrupted by General Durahan via a visual phone. It turns out that General Durahan came in the airplane mentioned earlier and they plan to snatch the Magic Stone and the Mystery Disk after Mocchi wins. So that General Durahan can fuse with Moo's soul and he can take over the world. Back at the stadium, the officials introduced this year's challengers - Genki's team. They appeared to an astonished crowd, wrapped in bandages. The baddies wondered how would Mocchi win in this state. Then they introduced the defending champions, The Legendary Great White Eyeball - Poritoka and The Master of The Aurora Attack - Most. Mocchi tells the official that he will fight Poritoka first. The rest of the gang took their seats among the crowd while Genki and Mocchi gets ready to fight. The match starts and Mocchi runs over with a barrage of Double Pounders, Poritoka easily avoided them all. Poritoka counters with Tongue Slap and Genki tells Mocchi to use Mocchi Cannonball. Poritoka jumps away and Mocchi lands hard on the ground. Poritoka decides to use his fearsome Tail Attack but after several heart pounding moments, Mocchi managed to avoid the attack to everyone's surprise. The gang was glad that their hard work paid off. Suezo recalls the training last night. Poritoka's tail attack was emulated by starting off with Golem's Tornado Attack, then Suezo's Tail Attack emerges from the tornado, followed by Hare and Tiger's body attacks. Poritoka laughs and said that they made a right choice by sending a spy over yesterday. Poritoka then surprises everyone by using a Tail Attack and Teleport combo. Mocchi is overwhelmed and falls to the ground. Mocchi climbs up and attacks with Mocchi Cannon while Poritoka gets ready to use the combo again. Poritoka avoids the Mocchi Cannon and tells them that he already saw it coming. Poritoka then continues his attacks by appearing all over the ring. Poison said that if Mocchi loses they will have to get the Magic Stone themselves and this worries Mum Mew. Poritoka floats over the fallen Mocchi and taunts him about his courage. Mocchi is badly beaten with bruises all over but he still stands up and prepares to fight. Poritoka gets ready to use the combo again while Genki tells Mocchi to use his (Genki) energy like it is his (Mocchi's) own. Mocchi gets pumped up by Genki's energy and starts to feel his opponent with his heart. Mocchi could see Poritoka coming and avoided the combo successfully. Mocchi leaps into the sky and uses Cherry Blossom Blizzard, sending Poritoka into the air. Mocchi fires Mocchi Cannon directly at Poritoka. Most who is watching from one side said "Its all over." Poritoka said, "This can't be happening!" and is sent flying into the sidewalls. Mocchi scores a Knock Out and wins the match. Everyone celebrates, Tiger and Hare hugged together but quickly separates. Even Poison and Mum Mew were hugging together but they too quickly separate and said that they are now one step closer to getting the Magic Stone and Mystery Disk. The badly beaten Mocchi tells Genki that he managed to beat Poritoka and Genki said it was a classic Knock Out. Most comes on to the stage to congratulate Mocchi and tells Mocchi to make theirs' a good fair match. They shook hands while the official tells everyone not to miss the last match between Most and Mocchi as it promises to be the match of the century.
General Durahan orders Mew and Gobi to show him the highlights of the Legend Cup thus far. Meanwhile, Most's public sparring match is held to raise funds for a gymnasium for young boys and girls as well as monsters that intend to participate in future monster battles.
Despite losing to Most, Most gladly destroys the championship belt to give the Magic Stone to the gang. Armed with the Magic Stone, the gang sets off in Most's plane to find a shrine to unlock the Mystery Disc and seal Moo forever. However, hot on their trail is General Durahan himself! Can they make it in time?