Brain: HENSHIN!!!!!.....What the ? Okay try again

Brain doing all different poses of transformation but still cannot transform.

Brain: HENSHIN

Crystal Peppler: I guess you had an unexpected burst of power because we were in trouble.

Brain: So it was a fluke ? You revived me because i have the potential to become Kamen Rider right ?

Crystal Peppler: Wrong! I just chose the weakest looking one in history, that way it doesnt add to their forces.

Brain point himself which the Professor nods.

Brain: Wait you mean my brain capacity is as small as a hard disk !?

Crystal nods his head and Brain began to laugh and bit his hankerchief.

Flashback POV

Brain: Even Heart needs me and Medic to transform!

Normal POV

Brain: 😔 So how can i become one so easily ?

Crystal: Im sorry for dragging you into this.......But thats not the reason why i chose--

Brain: PROFESSOR!!!!

Oogumo Great Leader: You want him ? Come and get him MUHAHAHAHA!
================================
Garage

Brain: PROFESSOR!!!

Oogumo Greate Leader: MUHAHAHAHAHA!!!

Brain: They even have Kamen Riders under their banner !?

While Brain is still hugging the wounded scientist, the scientist began to spoke.

Crystal: This is the answer Brain. To MU the existence of individuality itself is the enemy. To them, all are pawns for their plan of DOMINATION!!!

Oogumo Great Leader:

Brain: What did you say!?!?

Flashback POV

Normal POV

Crystal:

Oogumo Great Leader: Are you prepared ?

The IQ one stood up and clean his glasses with his Professor's memento.

Brain: Yes

Brain wear his glasses back

Oogumo Great Leader: Then die

Brain: I refuse

And now Brain began his speech!

Brain: SO IM PUTTING THIS TO STOP!!!! Even if i weak on my own....I must stop YOU!!!

Driver: Start Your Engine! Brain The Kamen Rider!

Oogumo Great Leader: GET HIM!!!!

Dark riders and Brain the Kamen Rider engaged to battle. One vs Six.

Brain: RAIDAAAAAAA Poison Hands GUHIHIHIHI NYEHEHEHEHEHEHE 😈

Brain thrust his hands into Kamen Rider Poseidon stomach.

Poseidon: UGH!!!!

Oogumo Great Leader: POISON HANDS!? BUT YOURE A RIDER!!!!

Brain: I, Kamen Rider Brain have 999 types of poison in my body!

Dark riders: THAT MANY!?!?!?

The dark riders began to enter panic mode!!!!!

Dark Riders: NO THANK YOU!!!!

Brain: Here i come POISON HANKERCHIEF!!!

And Brain threw the soaked hankerchief to Another Para-DX and Dark Kiva's face. Sadly theyre ded.

Brain: BRAIN GLASSES BLADE!!!!!

The IQ one slash and strike Wiseman and Duke, fortunately theyre dead leaving Dark Ghost stab by Brain.

Dark Ghost: T-that...That's just a recolor....it's not even your weapon!!!!!

And Dark Ghost explode, then Brain twist the ignition key of his driver.

Driver:  Hissatsu! Full Throttle Brain!

The emerald warrior began to execute a rider kick and the spider villainous began to create a slashing attack, fortunately Brain is able to land safely dodging the attack, and the energy began to move from his foot to his head.

Oogumo Great Leader: NANI!? NOT A RAIDA KIKU!!!???!?

Brain: BRAIN: HEAD CRUSHER!!!!

As Brain headbutt his the spider's stomach, the impact of the headbutt blow away the spider villainous.

Oogumo Great Leader:  Its not a kick but a HEADBUTT!? 

Brain: (*smirk*) HMMPH Dont you know ? My strongest weapon is right here (*pointing his head*)

Oogumo Great Leader: WHATS WITH THIS GUY!?!? HIS SKULL IS TOO STRONG!!!!!!!!!!

The spider began to scream and explode, while Brain began to ride his bike and enter the Lab of Mu, to find the Leader of Mu.

Brain: Leader of MU, COME OUT AND FIGHT ME!!!

Then a pillar -shaped-rectangle began to glow

Leader of MU: ONORE! KAMEN RAIDA BRAIN! I will end all individuality in this world! YOU HAVE MY WORD!!!!

Then the pillar-shaped-rectangle began to grow brightly, as its envelop Brain.

Brain: I wont let that happen!

But the power of the leader was too strong and turns out Brain is actually was dreaming this whole time and he is inside somekind of white void with technology circuit line around it.

Brain: AAAAAH AAAAH IT HURTS UT HURTS AAAAAAH!!!!!!!!

Heart: Hey Brain!

Brain began to woke up, finding his two comrades standing.

Brain: HEART! MEDIC! Where is this ? MOST IMPORTANTLY!!!! HEAR ME OUT!!!

https://www.youtube.com/watch?v=9EGwM8ACss0

Heart: You became Kamen Rider Brain and defeat MU ? My apologies Brain, i dont quite get what you're saying.

Brain: As i said, i'm a Kamen Rider too! My strongest weapon is right here! (*smirking and pointing his head*) BRAIN HEAD CRUSHER!!! (*Brain began to perform a headbutting*)

Heart: Medic can you help listen his story ?

Medic: Okay say AAH (*Opening brains mouth*) has little Bwain got a fever ? Did you hwit your head somewhere ?

Brain: No more diagnosing! Im not sick at all! I really become Kamen Rider!!!

While Bran and Medic are arguing, Heart's left hand began to glitch.

Heart: If remember correctly we should have become bits of data throughout this world, although its incomplete, why is our data the only ones gathered here ?

The scene changes where there is a computer, Go who is sleeping, and empty husk of Human-Type Roidmude with numberless and with Drive Driver and Shift Brace. Go began to wake up probably to get some coffee.

While the computer showing us its screen.

Computer:
-Chase (000): 5%
-Heart (002): 66%
-Brain (003): 82%
-Medic (009): 55%

Then the camera began to move to a book, this book has a title named:

"PROJECT NEO-CORE DRIVIARS for Kamen Rider TOP SECRET"

😲 Top secret PROJECT!?