Ash Ketchum vs Charles Darwin/Rap Meanings

Ash Ketchum:
'''Darwin wants to battle? Doesn't seem like a fight!'''

("_____ wants to battle" is a phrase used during the start of Pokémon battles in the video games, matching with how the battle starts from a location matching those used during Pokémon battles. Ash uses this to say Charles Darwin isn't a challenge for him.)

'''But this should be fun! I've yet to catch the Ghost-type!'''

(Throughout the anime, Ash Ketchum has never officially caught a Ghost-type Pokémon, the closest to owning one being when he got a Haunter to accompany him from Lavender Town to Saffron City before it left him. Charles Darwin is deceased, making him, essentially, a ghost as he is facing Ash. Thus, Ash plans to "catch" Charles Darwin, or "own" him, meaning to beat him in a rap battle.)

Got the highest speed stat, drop raps lightning fast,

(In Pokémon games, the Pokémon with the higher speed stat is the one that goes first. Ash Ketchum says this as he is the first to rap.)

So I can open my pockets and go Charizard on your ass!

(Pokémon is short for "pocket monsters", as they fit within one's pockets when inside of a Pokéball. Ash opening his pockets would mean letting out his Pokémon, one of which is a Charizard. Charizard is a fire-type, thus Ash uses his name to say he plans to burn Charles Darwin.)

'''Cause I'm Ash! And that's A-to the-shush!'''

("Shh" is typically used to tell someone to be quiet. Ash parts his name to tell Charles Darwin he shouldn't try to rap.)

I don't care how many beetles and butterflies you squoosh!



Your earthworms can't beat these magical beasties!



Your shit-talking mouth is the origin of feces!



You got candy raps, Reese's Pieces!



In this ecosystem, I'm the dominant species!



'''When it's time to train, I turn to Pikachu! (Pika!)'''

(Pikachu is Ash's closest and most often used Pokémon throughout the series, so when he trains his Pokémon, Pikachu is the one most often trained for battles.)

But when I need a weak verse, I choose you!

("I choose you" is a popular phrase used when letting out a Pokémon in a battle. He claims Darwin's raps won't be good, and that he'll pick Darwin if he wants this.)

Charles Darwin:
Hello there, welcome to a world called Earth,

(The beginning of Pokémon games typically start with a professor introducing the player to the world of Pokémon. Darwin reuses this, instead introducing Ash to Earth, the real world.)

Where actual minds do groundbreaking work!



If you're looking for the fittest, I'm the natural selection!



You're so ineffective you couldn't even turn 11!

(Despite the anime Pokémon having aired for years, something acknowledged in the anime as well, Ash Ketchum has always remained 10-years old.)

What you spit's just not hard hitting enough!



'''It's kids stuff! You're soft like a Jigglypuff'''

(Jigglypuff is a Balloon Pokémon, known for being squishy and able to deflate itself.)

You got no Game Boy, so you'll get the broom quick!

(The first Pokémon games were featured on the handheld Game Boy device.)

The real Ash packs a much bigger BOOMSTICK!



I'm a masterful naturalist!



What I've glimpsed will outclass all the crap on your laughable list!



My research reversed the first words of the Church!



You measure your worth by the sales of your merch!



Ash Ketchum:
Yo, um, real quick?



'''This dude spent eight years studying barnacle dick! Kick it!'''



'''You think I'm impressed by your boat trip? Please!'''



You're the most annoying thing on a Beagle since fleas!



You're a glitchy old man who's best left at sea!



Set sail and Galápago-suck on these!



Charles Darwin]
Look, Mighty Morphin' Michael Vick,



Your animated slave fights make me sick!



When I battle a foe from so simple a beginning,



I'm not Charles Sheen, but I am Dar-winning!



Ash Ketchum:
Man, if that's true, then nature is cruel,



Cause the only thing you're winning is your cousin's gene pool!



You lost three children while they were still small!



TB and scarlet fever; gotta catch 'em all!



Charles Darwin:
It took millions of years for mankind to evolve!



Now they hunch over cell phones playing with your balls!



And it was hard losing my daughters and their brother,



As hard as the wood that Oak gave to your mother.