Pokémon nicknames

Lumiere the Chandelure (Lumiere is French for "light," and is the name of the Candelabra from Beauty and the Beast)
Kazan the Typhlosion (Kazan is Japanese for "volcano." I gave this name to my shiny Typhlosion)
Bojack the Mudsdale (The nickname is based off the show Bojack Horseman. duh.)
Leif the Sceptile (Leif is a male name and a corruption/homonym of Leaf. The name Leif also means "Heir" or "descendant.")
Rafiki the Infernape (Named after the character from The Lion King)
Amethyst the Sableye (It's fond of gems, and this particular gemstone matches its color very closely. Also, "ame" means "soul" or "spirit" in old French.)
Papercut the Kartana (It's a Pokemon with a paper-like body that also has swords for hands. What else would you name it?)
Anomaly the Porygon-Z (An anomaly is something that is abnormal. Porygon-Z is based on the idea that the Dubious Disc, filled with malicious software, corrupted Porygon2 and it had caused major
errors.)
Tango the Roserade (Because in many forms of media, Tango dancers are sometimes depicted holding roses in their mouths.)

Oh boy I have a lot.

Ivy the Serperior (for the typing and from the name Snivy)
Lucky the Cobalion (he was my first legend and I considered myself "Lucky" at the time. I really wasn't. I used a Masterball.)
Gazelle the Virizion (after the species it resembles)
Aaron the Reshiram (Reshiram reminded me of the Air element and Aaron sounded like "air")
Zack the Zekrom (both start with Z. So original.)

Ember the Delphox (after the typing)
Layla the Charizard (literally no reason)
Liu the Lucario (sounded similar to Lucario)
Aura the Aurorus (from the names Amaura and Aurorus)
Lights the Xerneas (those things on the antlers kinda looked like Christmas Lights to me. I'd rename her Athena but I can't since I wiped the original save file)

Drake the Sceptile (sounded draconic and lizard-like)
Joanie the Mightyena (no reason)
Mitch the Breloom (sounded tough for a fighting-type)
Tessa the Swellow (no reason)
Serenity the Latais (sounded feminine, exotic, and psychic)
Sapphire the Kyogre (after the version it mascots)
Seiko the Cosplay Pikachu (after the character from Corpse Party)
Emerald the Rayquaza (after the version it mascots)
Goldfish the shiny Luvdisc (after the cracker, and obviously the color)
Meta? Gross. the Metagross (haha, jokes)

Freija the Greninja (suggested by a friend)
Tiny the Venusaur (irony)
Nala the Pyroar (after the character from The Lion King)
Ducky the Tyrantrum (after the character from Land Before Time + irony)
Candy the Sylveon (for the cotton candy color scheme plus a cute, feminine fairy-type name)

Hope the Gardevoir (seemed fitting for a feminine psychic/fairy type)
Bolt the Manectric (for the typing and after the character from Disney's Bolt)
Trevor the Absol (no reason)
Prime the Aggron (sorta after Optimus Prime from Transformers)
Seba the Latias (sounded psychic, and sorta after a friend)
Fly the Flygon (obvious reasons)

Flametail the Incineroar (after the ShadowClan medicine cat from Warriors, fits both typings)
Kodiak the midnight Lycanroc (after Kodi from Balto 3, a wolfdog with a similar color scheme)
Nicki Minaj the Tsareena (meme reasons)
Poison Ivy the Salazzle (for the typing and after the villainess from Batman)
Glacia the Alolan Ninetales (for the typing and sorta after Hoenn's Ice-type Elite Four)
Pancake the Alolan Raichu (we all know they love them!)
Rikki Tikki the shiny Gumshoos (after the mongoose from Rikki Tikki Tavi)
Lorax the Snorlax (haha, rhymes)
Hades the Zygarde (after the Greek god because power and stuff, technically not very fitting but)
Ramses the Kommo-o (after the Pharoah, Kommo-o looks like one)
Lucius the Silvally (sounds intimidating)
Squishy the Nihilego (after Dory's little jellyfish from Finding Nemo)
Cleo the (after the queen Cleopatra that it bears a resemblance to)
Travolta the Xurkitree (after John Travolta, "volt" for the typing and IT DANCES! AAAAA)
Snuggles the Guzzlord (irony)
The Thing the Necrozma (WHAT IS IT???)

Peridot the Decidueye (after the character from Steven Universe, I loved her so much I had to name one after her plus they're both green :/)
Ophelie the Primarina (sounded graceful)
FallenLeaves the dusk Lycanroc (after the character from Warrior Cats, who is also orange & white with green eyes)
Josiah the Kommo-o (sounded Egyptian)
Grimm the Alolan Marowak (after the typing and appearance, similar to the Grim Reaper)
Buddy the Mimikyu (c'mon he's adorable, he deserves an adorable & friendly name)
Houdini the Alakazam (after the escape artist and magician)
Gypsy the Naganadel (for the color scheme)
Great Wall the Stakataka (after the Donald Trump's Wall meme)
Severus the Necrozma (after Snape from Harry Potter)

Pip the Empoleon (from Piplup)
Tony Hawk the Staraptor (after the skater + he's a bird, so original)
Taka the Luxray (original name for Scar from The Lion King)
Riley the Lucario (from Riolu and after the guy who gifted the egg + my partner in Super Mystery Dungeon)
Leafy the Leafeon (for the name and the typing)
Gabriel and Uriel the Diagla and Palkia (after biblical Angels)

Sammy the Samurott (from Samurott and samurai)
Darla the Liepard (Liepard is simply adorable and darling!)
Centipeetle the Scolipede (after the character from Steven Universe)
Lars the Arcanine (after the character from Steven Universe)
Faline the Sawsbuck (after the character from Bambi)
I wish I could've named Zoroark Dark Destiny after my Zorua OC. But nope.
Dark Knight the Bisharp (after Batman, but he's LITERALLY a dark knight lmao)
Bob the Kyurem (because)
Not Aaron the Reshiram (not to be confused with my other one. :P)
Teresa the Mienshao (no reason)

Chrys the Meganium (from Chrysanthemum, a flower)
Pidge the Pidgeot (just a shorter version of the original name)
Kitsune the Ninetales (after the species it was based on)
Felicity the Espeon (sounds feminine and psychic)
Red the shiny Gyarados (after the Pokemon Trainer and obviously the color)
Drew the Dragonite (no reason)
Aoshima the Lugia (ONWARDS, AOSHIMA!)
Crystal the Suicune (after the version it mascoted)

Sorry for the huge post! .~.

The pokemon nicknames on my team are based on their slot positions, regardless of whether it makes sense for that pokemon in that specific game or not.

The 1st slot pokemon is always named Laptop, 2nd slot is Smartphone, 3rd slot is Toolbox, etc.

I just name mine the gayest names possible <333

I haven't nicknamed a Pokémon in ages, mostly because I could never come up with a wide range of nicknames. I usually just gave them names like Bob or Rick.

Sometimes it's an inside joke, sometimes it's a reference, and sometimes it's a name I simply see fit.

For example...

I'm the kind of guy who names their Tsareena "H Mayonnaise" because of something my friend said.

I named my Pinsir "Boomer" and my Heracross "Gravity" as a reference to Boomerang Kuwanger and Gravity Beetle from the Mega Man X series.

I named my Alolan Persian "Chi-Chi" after my cat.

But when I run out of nicknames, I just go with whatever. For example, I named my Silvally "Big Whoopsie" due to Type: Null being involved in some unforeseen accidents...and I wasn't cultured enough to find a good reference.