( so first warning ahead, this is not the final fight yet, I'm making this book longer and I'm verry cringe when it comes to battle description so heres the basic starting of this chapter, everyone climb on the high mountain, encounters a dangerous enemy, defeats them and found a large door that concealing SolarBot, they manage to open it and free Solarbot

Gopal: woaaaaaah!!! SolarBot is huge!
Maskmana: greetings SolarBot
Yaya: hi!
Ying: hello!
SolarBot: greetings heros of power shperas thnk you for releasing me
Amato: not problem
Gopal: hey you know who we are?
SolarBot: indeed... It was thnks to a bright light that shines within 1 of your comrades, who's light shines so bright, i have never seen sunch a light from a mere living being before...
Ash: geez was that a praise or sarcasm....
Admiral: lets bring it back to Tapops now
SolarBot: hold it, not yet
Yaya: huh? Is something wrong SolarBot?
SolarBot: i need to have a word with this boy here, may we have a private conversation
Ash: no need

Ash snaps his fingers, trapping everyone except Arthur in a green barrier made out of leaves

Ash: they can't hear us in there so what do you want?
SolarBot: you know the dark secret within you cannot be kept within the dark for long... They will bring it out to light soon...
Ash: heh so thats what, relax, i have alot of tricks up my sleeve

Ash snaps his fingers agian and set everyone free

SolarBot: before you all go, take this book
Gopal: dey? What is this giant book for?
SolarBot: take a look inside
Ash: its... Full of story about you guys...
Gopal: yeah look! Theres me!
SolarBot: this book contains your story and memories, it hold records of everything...
Yaya: hey... Take a look at BoBoiBoy chapter
Ying: huh???

In the book page of BoBoiBoy has a art of him and behind him a dark black figure, the next page has following quote " what lies behind the gentle smile dose that face sweetly hold, a trove of cosmic secret that has never been told"

Ying: ey? SolarBot what dose this mean?
SolarBot: that... You have to find the answer within the book itself ...
Yaya: in the book?
Arthur: like... Touching it?

With a single touch on the book page, everyone was sapped right into the book and fell into a dark abyss

Arthur: owwwww.... Oh no... Noonnonononono you can't be f------ kidding me
Rudy: where the hell are we...?
Arthur: ugh... We're... In BoBoiBoy memories...
Gopal: wiat really?!
Arthur: yes.... I geuss touching the page made us enter his past mind, we might see part of his memories ... And we're not getting out until we gone threw what the book wants to show us...
Yaya: oh i geuss that won't be so bad, BoBoiBoy never had any bad memories
Alicia: hey. Where's your brother?
Arthur: that... Will be answer shortly

Everyone walk to the first memory while Arthur stood back to look at the darkness, he sees a glooming figure within the darkness, with white hair and red eyes, smiling devilishly