Master Dave: Yin and Yang are trying to have a fight with Carl the Evil Cockroach Wizard, but Coop keeps popping up and interrupting it. He keeps asking whether or not Yin and Yang are good friends with Dave. When they finally tire of Coop's questions and say that they are Dave's friends, Coop then asks them why they missed Dave's birthday party. When Carl hears this, he thinks it will be much more interesting and potentially more destructive for Yin and Yang to face Dave's anger than against one of his own plans. So Carl stops attacking and lets Yin and Yang go, since Carl didn't have any good plans today anyways. When Yin and Yang arrive in the forest where Dave lives, the party has long since been over. Dave dejectedly says that it's okay because he figures that he's just not important or good enough as a friend for Yin and Yang to bother remembering about Dave's birthday party. Yin and Yang of course, feel pretty bad about this, and say to Dave that whatever they have to do to prove their friendship to Dave, they will do it! Then Dave gets a phone call from his parents. His parents have decided to throw Dave a Day-After-Birthday Party, and Dave is inviting his friends, Yin and Yang! Unfortunately, going to a party where a bunch of trees will be is the Last thing Yin and Yang want to do with their spare time, but they already made a promise to Dave, and they don't want to back out now and be seen as liars. So the day of the party comes, and a lot of the trees aren't as lifeless as Yin and Yang thought they would be. They end up meeting a lot of Dave's family tree (no pun intended!) at this party where Dave introduces his friends, Yin and Yang, as his Woo Foo Students! Yang is about to expose the truth to Dave's family by threatening to get an ax, until Yin realizes that an intervention is necessary. They go into a restroom, and Yin tells Yang that Dave is their friend and they should be helping them by remembering Master Yo's lesson. And Master Yo's image appears in the water of the toilet saying that no good ever comes of lying to a friend, but the truth will always save the ones you care for in the end. But Yin is confused because their lying is actually helping Dave become cooler with his parents, and now they don't even know what Master Yo's lesson is supposed to be about. So Master Yo's image gives up and tells Yin and Yang to figure it out! So Yin and Yang decide to play along with Dave's claim for a while. Yin helps out by magically levitating Dave, Yang helps out by cutting up Dave's sandwiches for him, and Yin and Yang prove their fire resistance to Dave. Yin and Yang call for a time out first, and run back into the restroom! Yin and Yang know there must be some point to the lesson Master Yo is trying to teach them, if they could only figure out what it is. Then Master Yo's image appears to remind them about the lesson again. Then Yin figures it out! It's not the lying of the Woo Foo Warriors that is causing all of this trouble, it's Dave! For once, Yin and Yang aren't the ones who have to be taught something. So they tell Dave that they will not play along with his game anymore and that Dave can handle his problem himself! But Dave knows that he actually can't handle the problem himself! Chip is a level 20 Wedgie Master and Dave can't compete with that! Unfortunately, Dave has something much graver to be worried about. Carl is camping in the woods and has finally come up with another plan. Out of spite and pure evilness, Carl decides to burn the forest to the ground with Fire Spirits! And while some of Dave's family can move and run away, some are actual trees and are stuck in the ground. Yin and Yang know that they have to save them. So Yang sucks up the bad guys with the Reverse Foo-nado, while Yin douses out their flames with a giant pitcher of lemonade, and as extra insurance, they seal up the doused flames inside a cup used for the lemonade with a talking acorn who threatens to open them up if someone makes a joke about roasted chestnuts. When Dave sees how his friends saved him even after his lying, Dave decides to tell the truth and confesses that he's not a Woo Foo Master at all. Dave only said that stuff to impress his family so that they would think he was cool. And Yin and Yang aren't his students, they are his friends. Dave's parents are actually (and surprisingly) relieved because they thought that their son was practicing Woo Foo for they feel it's stupid; even so, Dave's mother giggles and states, "I rather have a son who lived in the gutter and ate filth." Yin and Yang feel shocked at their ungratefulness because Chip told them that Dave tricked the rabbits into doing the dirty work for them and he admits that Dave is not a total dweeb after all. Right after that, Yin (and/or Yang) set the forest back on fire as Dave frantically screams for help while Yang stands by a rock and thinks he should put it back out again in five minutes which works for Yin who is proud of him for not saying nuts.
Destination Danger: Years ago, back when Master Yo was younger and still had his afro, he gave his gnome friend Gumpy, a special weapon. Master Yo told Gumpy to hide the Knuckles of Infinite Smackdown in a place that would be safe. Until the day would come that Master Yo would need them again. And Gumpy will know when the time comes. Fast forward to the present day, Gumpy is content on cooking Brisket Meat and watching the all Brisket channel, until a bookcase unexplainably falls on Gumpy! It then literally hits Gumpy that this must have been what Master Yo is talking about. Meanwhile, Yin and Yang are excited because tomorrow is the grand-opening of a new theme park: Magnatopia Land! The biggest, best action theme park dedicated to Magna cartoon characters and action! While they're watching this, Master Yo gets Gumpy's phone call, and becomes alerted to the fact that the Night Master is looking for the Knuckles of Infinite Smackdown! Master Yo knows this to be true as he sees two of the Night Master's lackeys spying in on his Dojo. So Master Yo discreetly tells Gumpy that he has a plan, but he will have to wait and tell it to him later. So Yin and Yang want to go to Magnatopia Land more than anything else, until they realize one small problem. The location of Magnatopia Land is more than three cities worth of driving away! Master Yo would never take time out of his life to drive them there. Until Master Yo tells Yin and Yang that today, he's going to care about their happiness and take them to Magnatopia Land! While Yin and Yang find this highly suspicious, they really don't care as long as they get to have their fun! Meanwhile, Dank and Dire inform their dark boss the Night Master about what they have found out, and the Night Master knows that he will have to make the Amusement Park less amusing for the Woo Foo Warriors! So Yin and Yang get to go on a road trip driven by Master Yo, while Dank and Dire follow them in order to try to stop them! They trick a huge bear into attacking the Warriors, but it soon turns out that the particular bear they tricked didn't really hold any grudges against anybody and wasn't all that savage. Then Dank and Dire attack Yin and Yang when they have to use the restroom in Redneckistan. And when Master Yo sees that Dank and Dire are busy, Master Yo uses his cell phone to tell Gumpy about what the true plan of action is. After Yin and Yang beat Dank and Dire and finish using the restroom, Yin wonders if they should tell Master Yo what happened to them. Yang, unaware that Master Yo already knows what has happened to them, tells Yin that Master Yo would only worry unnecessarily and might end up not taking them to Magnatopia Land if he found out, so they decide to keep quiet on the matter. So Yin and Yang finally arrive at what appears to be Magnatopia Land. Master Yo tells them that their sacred Woo Foo task is to buy a pair of big, Magna googly eyeglasses while Master Yo goes off to do nothing important whatsoever. Even though Yin and Yang think that this is a lame mission, it doesn't matter to them as long as they can enjoy Magnatopia Land! Unfortunately, it's not the amusement park at all, but a trap! Dank and Dire capture Yin and Yang by tying them up! Then the Night Master appears in a hologram and wants to know what Yin and Yang have been entrusted to do. Yang says that he would never tell that Master Yo wanted Yin and Yang to pick up a pair of big, Magna googly eyeglasses, until he realizes that he just did. But when Dank and Dire both return wearing them, Night Master thinks that this couldn't possibly be what Master Yo was seeking. And the Night Master is right! Master Yo appears at that very moment with the Knuckles of Infinite Smackdown! He claps them together and destroys the Night Master's hologram, frees Yin and Yang, and destroys the hideout of Dank and Dire! Yin and Yang know what to do from here, they beat Dank and Dire up and literally throw them into the trash! Master Yo confesses that he had to use Yin and Yang as bait in order to throw the Night Master off of Master Yo's trail, but gives them $10 to not say a word about it. So it seems to Yin and Yang that there was no Magnatopia Land after all. But as it turns out, there is one, and Master Yo even keeps his word and lets the children have fun there, just as long as they pick up a pair of big, Magna googly eyeglasses for him! Yin and Yang promise that they will!