(Next Morning)

"Alright. Ash and Serena. I have been thinking about it and now I think the time is right to take the next step of your training." Dragon Emperor says.

"Alright what is that?" Ash asks in an excited manner.

"You both have done excellent jobs when it comes to your Mega Delphox and Lucario. Now it is time for some more mega stones." Dragon Emperor says before opening his bag and bringing out 3 pendants.

"Which Mega stones are these?" Serena asks.

"The two on the left are a Salamencite and Arcanite for your Salamence and Arcanine respectively. The one on the right is a Sceptilite for Ash's Sceptile." Dragon Emperor says.

"Cool." Serena says as she takes her 2 pendants.

"But why does Serena get 2 and I get only 1?" Ash says in a pouting tone while taking his.

"Because you already have a Mega stone which you received from the initiation ceremony." Dragon Emperor replies.

"Oh that one? It's rubbish. It doesn't go with any known Pokemon." Ash says.

Dragon Emperor chuckles upon hearing it.

"What's so funny?" Ash asks upon seeing Dragon Emperor amused.

"The thing that is funny is what you call rubbish is actually the most rare and one of the most strongest Mega Stones possible. I am surpised you didn;t question me regarding this Mega Stone earlier?" Dragon Emperor asks.

"How would I know that you can recognize this mega stone? I can't read minds." Ash replies.

"I see. Then let me jog your memory. Do you remember the day you fell into the fountain in Santalune City?" Dragon Emperor says.

"I do. What about it?" Ash asks.

"Do you remember what I said after the phrase 'Mega Evolution is not something a kid should play with.'.If you do then tell me." Dragon Emperor asks.

"That's easy. You said "Especially that Mega Stone." Ash replies. Suddenly he realizes that Dragon Emperor had hinted that he knew which Mega Stone is this all that time ago.

"I see. I guess you didn't pick up on my little hint. But no matter. In a way it is good that you didn't. Here I have something else for you two as well." Dragon Emperor says while pulling his bag and opening it again.

"What is it?" Serena asks.

"Z rings." Dragon Emperor replies as he hands both Ash and Serena a Z ring which they put on their wrist like a watch.

"Cool. The sensation where it touches the skin is so cool and soothing." Serena says while admiring the ring.

"Yes indeed. The ring is made from special ore which is almost exclusive to the Alola region. It has special properties. Properties which you shall study one of these days." Dragon Emperor replies.

"So now we can use Z moves. That's cool. I want an Electrium Z and do Gigavolt Havoc with Pikachu." Ash says to Serena and Dragon Emperor's surprise.

"How did you know that Gigavolt Havoc is the Electrium Z move Ash?" Dragon Emperor asks in a pleasant tone.

"Well since you told us about it I have been excited about. So I did a little research about Z moves in the Alola region. I have heard you need to go through a Grand Trial or something to get your ring and crystal. Also I have heard Alola has things like island Guardians and Malsadas and Totem Pokemon. I can't wait to check that region out" Ash says in an ecstatic voice.

'Good. Now put all this enthusiasm and focus all this into your studies. We shall study about Mega Evolution and Z moves in details and I shall introduce the Z crystals to you one by one." Dragon Emperor says.

"Right." Ash and Serena say in unison.

(After a morning of practicing)

"Alright now Ash and Serena it is time we had a little theoretical class on Mega Evolution." Dragon Emperor says.

"Great." Ash and Serena said though inside they felt so not great about it. Especially after a morning of workup and practicing various Z move poses.

"Now ignoring the sarcasm today we will talk about Mega Evolution with respect to the Pokemon Charizard. Tell me what do you know of Charizard's Mega Evolution from my previous lessons?" Dragon Emperor asks.

"Well Charizard has 2 forms of Mega Evolved forms A Mega Charizard X which is a Dominant Fire and Dragon type with Recessive Flying characteristics and a Mega Charizard Y whose type doesn't differ from Charizard's upon mega evolution." Serena says.

"Furthermore Mega Charizard X's ability is Tough Claws while that of Y's is Drought." Ash says.

"Excellent as always. Now today we will talk about a different form which is Mega Charizard Z." Dragon Emperor says.

"Mega Charizard Z? This is new." Serena says as she opens up her laptop in order to take down today's notes. She hand the laptop to Dragon Emperor so that he can put in his password. Then he gives it to Ash for his password. Finally she inputs her password and signals to Dragon Emperor she is all set to go.

"Charizard is the only known Pokemon which can Mega Evolve in 3 ways. No other Pokemon till now has been capable of doing so. The reason behind this 3 different forms of Mega Evolution can be attributed to it's interesting form of passive evolution where it lost it's Dragon typing due to several factors and stimuli." Dragon Emperor says before pausing.

"If it has 3 Mega Evolved forms then why do the professors only know about 2 forms?" Ash asks.

"An excellent question. The answer is because the Mega Stone Charizardite Z is extremely rare. Now can any of you take a guess what is Mega Charizard Z's typing will be?" Dragon Emperor asks.

"Well definitely Dominant Fire and maybe Flying and Dragon Typing as well. Based on the other 2 forms would be my guess." Serena says.

"What about you Ash?" Dragon Emperor asks.

"Well I am going with what Serena said." Ash replies.

"You are right of course. But to tell you the truth Mega Charizard Z actually has 5 dominant types." Dragon Emperor says.

"5 Dominant types! In one Pokemon?" Ash and Serena shout in unison.

"Yes. It is a Dominant Fire,Dragon, Flying, Fighting and Steel type Pokemon. This is why Mega Charizard Z is a force to be reckoned with. It the most powerful Fire type and the rarest Fire type Mega Evolved Pokemon. The reason why I tell you this now is because Ash the Mega Stone you have is actually a Charizardite Z." Dragon Emperor says. Ash's jaw drops on hearing that. Serena on hearing that squeals in excitement and gives Ash a hug which he does not reciprocate because he is still dazed.

"No wonder. Prof Sycamore couldn't recognize it." Ash says as he takes out the mega stone and looks at it.

"Of course he couldn't. This particular mega stone has not been seen in the past 6000 years." Dragon Emperor says.

"What!" Ash and Serena shout so loud causing even Dragon Emperor to flinch a little from the volume.

"Sorry. But is that really true. 6000 years!" they say in unison.

Dragon Emperor nods.

"Wow. You are lucky Ash." Serena says as she inspects the stone Ash is holding.

"Hold on a second. If it is really not been seen for 6000 years how did you recognize it?" Ash asks.

"I may not have been 6000 years ago to see it but the Pokemon masters left a vivid description in the ancient archives of the Pokemon Master library. When I saw it I myself was taken aback." Dragon Emperor says.

"I see. Well time to check it out." Ash says as he tosses Charizard's Poke-ball.

He is about to place the stone pendant on Charizard when suddenly he hears Dragon Emperor's voice.

"Stop. You need to be extremely careful while using it. Come sit down at once and put Charizard back in it's Poke-ball." Dragon Emperor says in a firm and surprisingly alarmed voice.

"Okay." Ash says before looking at Serena with a curious tone and returning Charizard to it's ball.

"Before you use that Mega Stone you must first have all the prerequisite knowledge. And I am not joking here. This is not a mega stone to be used lightly. It is extremely dangerous if used in an immature manner." Dragon Emperor says with a very serious look.

"Please continue." Ash says.

"Alright tell me Serena what was the introduction I gave you regarding Mega Evolution's mechanism?" Dragon Emperor says turning to Serena.

"Easy. The key to mega evolution is the bond shared between trainer and Pokemon. The Mega Stone and the key stone act like a receiver and the sender. The key stone transforms the Aura of the trainer into a form which can travel to the keystone. After the level of Aura crosses a certain threshold this energy read the genetic information required for the change in the Pokemon after mega evolution and takes it is just like Evolution Stone process. The energy of the stone in this case is a mixture of the signal which is sent from Aura Threshold gene to the Mega Evolutionary Regulatory gene and Aura Energy. This triggers the mega evolution process." Serena replies.

"Good. Now Ash what makes it temporary?" Dragon Emperor asks turning to Ash.

"Easy after the battle is over the connection which is consistently feeding the Mega stone the trainers Aura and keeping the energy above the threshold level is broken. When that happens the trainer aura energy flow stops and without the energy the Pokemon reverts back to it's stable evolutionary stage." Ash replies.

"Good now listen closely both of you. For it is very important. What makes Charizardite Z so powerful and also dangerous is that the threshold level it has is 3 times higher than the threshold level in Charizardite X or Y. This increase allows it not exceptionally strong power but is also responsible for mutating the class DNA in such a way that it can accommodate the 5 different types of Pokemon DNA types in a dominant state. This is what is dangerous about it. If you are not ready then it will cause you to faint and if you happen to be in a difficult battle at the moment a lapse of connection happens then it could also cause harm to not just you but your Charizard as well. There has even been a case when a trainer and his Charizard received a mental injury. Of course that was around 18,000 years ago but still it is not something to be taken lightly." Dragon Emperor says in the most serious tone he has ever used.

Ash gulps on hearing that. Serena looks at Ash in a reassuring way ash she holds his hand for support.

"But that is not the main problem." Dragon Emperor says quietly.

"That is not the main problem? What does classify as a main problem for you Dragon Emperor?" Serena says in a loud tone.

"Ever since i have seen Ash's mega stone I have been training him hard to ensure that this problem does not happen. However the main problem is that due to the high threshold level it's power is great as well. If Ash does not have the mental fortitude needed to control that power it will take control of both Ash and Charizard causing them both to do anything. Even go out on a rampage if need be. Now Ash you know everything needed before using it. That mega stone came to you for a reason. A mega stone not seen for 6000 years doesn't just pop into someone's hand by chance. I think destiny has plans for you using it. However if you are willing then you will master this mega evolution under my tutelage and guidance. Of course there is the danger as well. So whether you wish to use it is up to you. It's your decision." Dragon Emperor says.

"I will need some time to think about it." Ash says before getting up and walking away.

"I will come with you." Serena says as she tries to get up but the Dragon Emperor holds her hand and nods his head telling her "This is between him and his Charizard. There are somethings you should know not to interfere in. Especially if you plan on becoming his wife in the future."

Serena goes crimson on hearing that and then she eventually sits down.

"I guess so." She says in an awkward way trying to digest the Dragon Emperor's words while the Dragon Emperor is chuckling at Serena's response. Then he again becomes concerned when his thought drift back to Ash's Charizardite Z.

'This might not just be one of Ash's but mine most challenging trials as well. Only time will tell I guess.' He thinks to himself.