Here's one I wrote for you guys. A Kalos PokéRap to the tune of the Unova one.

Litleo is a small brave guy,
Talonflame burns through the sky.
Gogoat rides really fast,
Spritzee makes sweet smells to last.
Chespin is hard to the core,
Watch out for that loud Pyroar.
Flabébé lives on colorful flowers,
Dedenne loves electrical power.
Bunnelby chomps right through the ground,
Watch out for that Froakie's Pound!

(CHORUS:)

I can't stop catching em all!
I can't stop catching em all!
I can't stop catching em all!

Fennekin lights up its ears,
Amarusu live for years.
Inkay flips you upside-down,
Helioptile cannot frown.
Skiddo jumps over the ledge,
What's that sword? It's a Honedge.
Swirlix lives from a diet of sweets,
Noivern blasts some funky beats.
Xerneas represents our life,
Malimar shines a stunning light.

(CHORUS)

Spewpa's covered in weird scraps,
Skrelp has a poisonous wrap.
Oorotoo is a mysterious tree,
Torimian is cute and fluffy.
Chigorasu has a nasty bite,
Pacham's always up for a fight.
Vivillon's such a pretty bug,
Espurr's looking kinda smug.
Clauncher shoots water from its claw,
Sylveon leaves its opponents in awe.

(CHORUS)

Gekogashira will steal your stuff,
Hariboogu has a shell that's tough.
Teerunaa waves its magic wand,
Yveltal comes from the great beyond.
Nobody wants to look like Scatterbug,
Pangoro's no bear you'd want to hug.
Mega Pokémon are a bunch of temptress,
That leaves Fletchling. He's relentless!

(CHORUS)