One day in Koopa Kastle, Bowser was recovering from an injury from the Marios' last beating.

Bowser: UGH! Well, I'll just use the hidden cameras inside the floorboards of the doomships to see my failures.

Bowser looks at the cameras. First, his own.

Bowser: So... I was defeated by Mario in a Hammer Suit. All right, I won't make the mistake of putting those in Mario's way again.

Then, he sees Ludwig.

Bowser: Hammer Suit.

Lemmy.

Bowser: Hammer Suit.

Roy.

Bowser: He...charged them, dropped his wand, and hit the wall so hard he fell out of his ship. Great...

Iggy.

Bowser: He broke his glasses, and the Mario Brothers slapped him until he cried and surrendered. Pathetic!

Wendy.

Bowser: She broke a nail and ran away...

Morton.

Bowser: He said he was "Koopatacular", Mario asked if that was a word, he tried to look it up, and Mario hit him with fireballs until his defeat.

Larry.

Bowser: He tried, but lost horribly. That's IT! The Koopalings cannot be trusted, excepting my two oldest sons. I have an idea...

The next day, Bowser summoned the Koopalings to his secret underground warzone.

Bowser: Welcome, kids!

Lemmy: Hi Dad!

Ludwig: Greetings!

Roy: Wazzup?

Iggy: Whadda you want?

Wendy: Just get this over with.

Morton: Yes, Father, Dad, Daddy, Birthfather, Person who...

Larry: Hello.

Bowser: I've summoned you all here for an important reason. But first, LEMMY AND LUDWIG MUST GO TO THE HALL AT THE OTHER SIDE OF THE ARENA FOR A PUNISHMENT!

Lemmy and Ludwig: WHAT?

Bowser: You heard me, GO!

Lemmy and Ludwig hang their heads and go to the hall. The other Koopalings taunt them while they go. When they're gone...

Bowser: Now, I'm going to tell you kids that I LIED!

Larry: You're not my father?

Morton: I hate wedding cake?

Wendy: You're not King of Koopas?

Iggy: I'm not a wimp?

Roy: My name's not Roy?

Bowser: WRONG! Lemmy and Ludwig aren't being punished, they're being rewarded.

Koopalings besides Lemmy and Ludwig: WHAT?

In the hall...

Lemmy: A computer, a field of balls, and every fun thing imaginable?

Ludwig: A pile of machine parts and a huge box of chocolates?

Lemmy: YAY! Now I can accept this! Hey, you made me say that!

The Dryest Bones: Oh sure, blame it on the guy whose fault it really is!

Ludwig: I don't care, let's just have fun.

Lemmy: Yeah!

Not in the hall...

Bowser: I've been studying you Koopas, and you all have greatly disappointed me. Now, I'm considering replacing you. So, I've come up with a tournament where you and all of the other beings that are killed in three hits will fight to decide who gets to continue to live with me and fight Mario. Here's the signup sheet.

All of his kids sign, with Wendy being hesitant.

Bowser: Now, here are the brackets:

Roy VS Boom Boom
Iggy VS King Bob-omb
Wendy VS Chief Chilly
Petey Piranha VS Morton
Larry VS Eyerok
Chargin' Chuck VS Baby Bowser
Bigger Boo VS Monty Mole

Bowser: The winner and runner-up of this tourney will stay with me, Lemmy, and Ludwig in the castle. And... FIGHT!

Note: These battles aren't in order

And the battles began! In one battle, someone threw a person down onto the ground super hard, and he was defeated. In another, someone was hit in the back three times and blew up due to extreme size. In one, a fistfight broke out, but one of them shook the arena and KO'd the other. Another used a technique, but it just make its opponent bigger, and crushed her. Then, one challenger was dried out of its grime by its opponent. One tried to hit his head on his foe, but got crushed by the duo. Finally, a tiny tyrant was hit by a football.

In round two, the first fight was done by how it usually was: lopsided, quick, and easy by the older one. Then, the next challenger fell down a pit three times and shattered. Finally, a team was taken down by their opponent.

Bowser: Now, the winners of Round 2-1 and round 2-2 will fight, and the winner of rounds 2-3 and 1-7 will also duke it out. COMMENCE BATTLE!

In the 2-1/2-2 match, both fighters used the same technique. Finally, they summoned some robots. The person with the robot in the shape of a frog won. In the 2-3/1-7 match, one of the people endured an onslaught of explosives, and then countered for the win.

Bowser: Now, you both are going to stay with me, but let's just see which one of you if truly the best. And... FINAL FIGHT!

Both fighters fought bravely, using every move they had. Finally, one of them used three successive projectiles and defeated his opponent.

Bowser: And the winner is...