Scene takes shortly after Ash Ketchum’s recovery  
After Pikachu took down Ash’s Mega Charizard X and Serena giving ash the hopes he needs to find himself again, Ash gains back his concious and speaks to Serena..  
Ash:“S… Serena?…”  
Serena:Gasp! “ASH?!” Serena hugs him with joy and thankfulness “Oh Ash, you’re okay!” Ash:“W-What happened?.. Why are we?-..”  
Pikachu:“PIKAAAA PIII!!”  
Ash:“Hahaha!! Pikachu!!”  
Pikachu:“Pipipikaa~ 😭💕”  
Ash smiles, knowing he’d scared Pikachu  
Ash:“Hey, it’s alright buddy~ 😌 I’m sorry I scared you. You know I’d never abandoned you buddy!”  
Pikachu:“Pikachu! Pika!_{” Ash:“Ahaha!}” 😄  
Pikachu hugging ash dearly~
 
Engineer:“Yeeeeeeehaaaw!!~ Welcome back, partner!”  
Milly:“Welcome back Ash! 😄 We’re so glad you’re back to your conciousness!”  
Ash:“Heh~ thanks guys, I’m sorry I scared all of you as well 😅”  
RD:“No problem, kid”  
Scout:“Yah!”
 
However..  
”RrrrrErrrrrrrorrrr.....”  
Ash:“Huh?…”  
Pikachu:“Pi?…Piiiiiiii… 😡 Pi! Pi! Pi! Pika! 😠”  
Mephiles apears out of his shadowy portal, tsking at Ash ashamed..  
Tsk.. Tsk… Tsk..  
“I have to say Ash, I'm really quite ashamed of you..”  
Ash glares at Mephiles..  
Ash:“What’d you mean Mephiles?..” 😠  
“I should've known you'd always be a weak, and unfulfilling Master Trainer.. Don't you see these peseants are your down fall?! Friendship has made you weak and un-enduring! Love has made you unable to win anything!”  
Ash still glares  
Mephiles:“I promised you I'd be your guide, to forget these fools who stand in your way. Yet you highly disappoint me... If you'd kept being my apprentice, you wouldn't have need these weaklings and cowards...”  
…  
You’re wrong Mephiles..  
“Hmmm?..”  
Ash:“I don’t need power to be a Master Trainer nor do I need cheating to become one…”  
Ash looks at the others of the squad  
“I may have been a bad trainer and not the best at what I can do. But no matter what, my friends are always there at my side and there to help. I may have lost many leagues, and even though that’s not one of my greatest achievements, as long as I stay strong I can win anything alongside my friends who help me do it… You see Mephiles, being a Pokémon Master isn’t about being powerful or better than those who aren’t… What matters of being a Pokémon Master, is being the very best like no one ever was..”  
Pikachu:“Pika pikaaa~” 😊
 
…  
But Mephiles didn’t care… And never would..  
“RRRRRAAAAAAAAAAAAAAAAAAAGGH!!!"  
Ash:“huh!?”  
“INSAGNIFICANT FOOLS!! YOUR FRIENDSHIP AND LOVE WILL BE YOUR UNDOING!!”  
The dark six and Mephiles minions come out from the shadows… Ash turns his cap backwards..  
Ash:“Ready Pikachu?..”  
Pikachu:“pi!..”  
…  
Ash:“LET’S GO GUYS!!”  
Soldier:“GIVE EM’ HELL BOYYS!!”  
RD:“LEEET’S DO THIS!!”
 
The first major battle against Mephiles begins…