Las Vegas, Nevada (Real World)

The biggest place where it has a truckload of casinos and expensive hotels.

A Koopa with a black shell and purple hair crashes into the streets of the Las Vegas strip. After getting up, dusting himself off, and taking a look around, only one thing is on his mind...
Alex: Where the hey am I?

A Tourist walks up to Alex.

Tourist: You look funny. Anyway, you are in Las Vegas.

*Cards coming out of nowhere and kills the tourist. Blackjack appears.*

Blackjack: Hello Vegas, it's me, Blackjack, your old friend. I have returned for one reason. Revenge!! *Summons Card Monsters to destroy slot machines, and even card dealers.*

Alex: I was going to kill him anyway for saying I look funny. Anyway, Mr. Blackjack? If you're so obsessed with cards, seeing as you use them as monsters, why are you killing the source of them?

Blackjack: Are you a twit?! They rejected me for performing the forbidden dance!! They say I was a disgrace to the casinos around the world. All I want is respect. FORCEFUL RESPECT. So they better make me their king of all casinos, or they pay the price of my black magic. And you know too much, therefore I must destroy you as well. *Throws explosive cards at Alex, which explodes for that way.*

I have no idea what that last sentance meant, so let's just say the explosions barely miss Alex.
Alex: Now, I don't take kindly to people who say they want to destroy me.
Alex takes out Doomsday.
Alex: Any last words?

Blackjack: Hmph. You're gambling your life just to fight me? You are so foolish.

*Blackjack threw more explosive cards at Alex.*

Bean and Bark enter the topic.
Bean: SWEET! WE'RE IN ANOTHER PLACE WITH SLOT MACHINES!

Alex leaps high into the air, over the cards, and slices Blackjack across the body before landing on the ground.
Alex: Work on your puns.

Blackjack: I'll stop with the puns for now. *Throws a Roulette Wheel on Alex and hits him.*

Alex tosses the roulette wheel off.
Alex: Neat trick. Here's mine.
Lightning strikes Alex, covering his body with electricity. His pupils disappear as his eyes start glowing red and tattered, bat-like wings sprout from his body. Dark Alex pulls out Entropy and points both swords at Blackjack.
Dark Alex: Feel lucky, punk?
Lightning shoots from the swords and hits Blackjack.

Blackjack: Impressive.. *Uses his skill, Star Blast, to blast Dark Alex.*

Dark Alex deflects the Star Blast back at Blackjack.

*Blackjack once again threw explosive cards at Dark Alex.*

DA effortlessy slices all of the cards in half.

*Blackjack teleports in and teleports behind Dark Alex and smashes him down.*

Before hitting the ground, DA quickly flies back up and mercilessly electrocutes Blackjack.

Blackjack: GAHH! *falls down* Urgh... AH... What.. are you?!

DA: Someone who just kicked your booty.

Blackjack: I may have one more trick up on my sleeve. *summons a gigantic slot machine robot and gets in* Now you will see the true meaning of pain. *Blasts Roulette Disks at Dark Alex.*

DA flies around the roulette disks and lands on the slot machine robot, then shoots lightning from his hands at it. As metal is not friends with electricity, this is probably not good.

Blackjack: AAAAAAAAAAAAAAAAHHHHHHHH!! *Blown out of the robot.*

*Toothy and Cuddles plays a slotmachine. They match the lucky 7s. The slot machine spews out a truckload of coins*

Toothy and Cuddles: Yay!! Ha ha ha ha!!

*CRASH!!! Blackjack is stuck in the slot machine. It falls on Cuddles and Toothy and killed them both.*

As Alex cannot see this, he does not care. Even if he could, he probably wouldn't care. DA then turns back to his regular form.
Alex: Yeah, that's why you don't mess with me.
Alex leaves Las Vegas (and somehow doesn't get an Acadamy Award for doing so).

Cuddles and Toothy Magically come to life seeing how that is already the 100th time they have died.