Universal Studios Random-ness/Meetable Characters

GUIDE:
 * 🎃= This character can only be met on the month of October
 * 🎄= This character can only be met on the month of December
 * Text in "bold" = This character is upcoming/is in an upcoming land
 * ⭐= This character appears on a special date/occasion
 * [Text in Square Brackets] = Franchise the character originates from

Backlot Tour

 * Gru [Despicable Me]
 * Margo [Despicable Me]
 * Edith [Despicable Me]
 * Agnes [Despicable Me]
 * Kevin the Minion [Despicable Me]
 * Dave the Minion [Despicable Me]
 * Bob the Minion [Despicable Me]
 * Marilyn Monroe [Marilyn Monroe's fame]
 * Charlie Chaplin [Black & White Charlie Chaplin Shorts]⭐ (appears every 15-18th April)
 * Frankenstein [Classic Monsters]🎃
 * Bride of Frankenstein [Classic Monsters]🎃
 * The Invisible Man [Classic Monsters]🎃
 * The Terminator [The Terminator]🎃
 * Zombies [The Walking Dead]🎃
 * Woody Woodpecker [Woody Woodpecker]
 * Winnie Woodpecker [Woody Woodpecker]
 * E.T. [ET]

New York City

 * Elmo [Sesame Street]
 * Grover [Sesame Street]
 * Super Grover [Sesame Street]🎃 (replaces Grover on Halloween)
 * Big Bird [Sesame Street]
 * Cookie Monster [Sesame Street]
 * Abby Cadabby [Sesame Street]
 * Ernie & Bert [Sesame Street]
 * Oscar the Grouch [Sesame Street]
 * The Count [Sesame Street]🎃
 * Loui The Pizza Man [No franchise, but based on Loui's NY Pizza Parlour]⭐ (appears on February, June and September)
 * Beetlejuice [Beetlejuice]
 * Red (in Movie Form) [Angry Birds]
 * Chuck (in Movie Form) [Angry Birds]
 * Bomb (in Movie Form) [Angry Birds]
 * Hal (in Movie Form) [Angry Birds]
 * Stella (in Movie Form) [Angry Birds]
 * Jim, Jake and Jay (in Movie Form)
 * The Classic Flock [Angry Birds]⭐🎄 (Replaces all the aforementioned Angry Birds characters to their classical, non-limbed forms)
 * Hashtag The Panda [The Tonight Show Starring Jimmy Fallon]
 * Tom Turkey [Macys Thanksgiving Day Parade]⭐️ (Only appears in November and December)

Netflix Studios

 * El [Stranger Things]🎃
 * Demogorgon [Stranger Things]🎃
 * Viktor Hargreeves [The Umbrella Academy]🎃
 * Masked Guard [Squid Game]
 * Every member of The Paladins [Voltron: Legendary Defender]
 * Princess Allura [Voltron: Legendary Defender]🎄
 * Zarkon [Voltron: Legendary Defender]🎃
 * Captain Underpants [Captain Underpants]
 * George Beard & Harold Hutchins [Captain Underpants]
 * Professor Poopypants [Captain Underpants]🎃
 * Dog Man [Dog Man]⭐️ (Appears on January, March, August, and December)
 * Sam-I-Am [Green Eggs and Ham]
 * Sunny Starscout [My Little Pony: A New Generation]
 * Pipp Petals [My Little Pony: A New Generation]🎄
 * Izzy Moonbow [My Little Pony: A New Generation]
 * Hitch Trailslazer [My Little Pony: A New Generation]
 * Zipp Storm [My Little Pony: A New Generation]🎄
 * The Mane 6 [My Little Pony: Friendship is Magic]⭐ (Appears every 8th-12th October)
 * James Rallison (Oddballs)
 * Max (Oddballs)
 * Cuphead and Mugman [Cuphead]
 * Ms. Chalice [Cuphead]🎄
 * Elder Kettle [Cuphead]
 * The Root Pack [Cuphead]
 * Baroness Von Bon Bon [Cuphead]
 * Chef Saltbaker [Cuphead]🎃
 * The Devil [Cuphead]🎃
 * King Dice [Cuphead]🎃

Pokémon Port

 * Pikachu [Pokémon]
 * Eevee [Pokémon]
 * Charizard [Pokémon]
 * Greninja [Pokémon]
 * Ash Ketchum [Pokémon]
 * Gengar [Pokémon]🎃
 * Mewtwo [Pokemon]🎃
 * Mimikyu [Pokemon]🎃
 * Ball Guy [Pokemon]⭐️
 * Jirachi [Pokemon]🎄

Toon Lagoon

 * Betty Boop [Betty Boop]
 * Popeye [Popeye]
 * Bluto [Popeye]
 * Olive Oyl [Popeye]
 * Rocky and Bullwinkle [The Adventures of Rocky And Bullwinkle]
 * Dudley Do-Right [Dudley Do-Right]
 * Snidley Whiplash [Dudley Do-Right]🎃
 * He-Man [Masters Of The Universe]
 * Skeletor [Masters Of The Universe]🎃
 * Gumby [Gumby]
 * Pokey [Gumby]
 * The Blockheads [Gumby]🎃
 * Papa Smurf [The Smurfs]
 * Brainy Smurf [The Smurfs]
 * Clumsy Smurf [The Smurfs]
 * Smurfette [The Smurfs]
 * Gargamel [The Smurfs]🎃
 * Bugs Bunny [Looney Tunes]
 * Daffy Duck [Looney Tunes]
 * Elmer Fudd [Looney Tunes]
 * Lola Bunny [Looney Tunes]🎄
 * Waldo [Where's Waldo]⭐ (He has a "1-day chance" throughout the entire year to be spotted and he will roam around for about 10 minutes. The day is not fixed and is randomised, it is also not publicly announced anywhere on when Waldo will appear beforehand)

Super Nintendo World

 * Mario [Super Mario Bros]
 * Luigi [Super Mario Bros]
 * Peach [Super Mario Bros]
 * Toad [Super Mario Bros]
 * Yoshi [Super Mario Bros]
 * Toadette [Super Mario Bros]
 * Bowser [Super Mario Bros]
 * Bowser Jr. [Super Mario Bros]🎃
 * The Koopalings [Super Mario Bros]🎃
 * Koopa Troopa [Super Mario Bros)🎃
 * Spike [Super Mario Bros]🎃
 * Wario [Super Mario Bros]🎃
 * Waluigi [Super Mario Bros]🎃
 * Donkey Kong [Donkey Kong]
 * Diddy Kong [Donkey Kong]
 * Dixie Kong [Donkey Kong]
 * Rabbid [Rabbids]⭐️ (Only appearing until October)

Sci-Fi City

 * Agent "U" [Based on an agent from Men In Black]
 * Xenomorph ["Alien" Horror Franchise]🎃
 * Optimus Prime [Transformers]
 * Bumblebee [Transformers]
 * Megatron [Transformers]
 * Cylon [Battlestar Galactica]🎃
 * Peashooter [Plants vs. Zombies]
 * Sunflower [Plants vs. Zombies]
 * Crazy Dave [Plants vs. Zombies]
 * Nate Timely [Plants vs. Zombies]
 * Patrice Blazing [Plants vs. Zombies]
 * Browncoat Zombie [Plants vs. Zombies]
 * Dr. Zomboss [Plants vs. Zombies]🎃
 * Disco Zombie and his Backup Dancers [Plants vs. Zombies]⭐️ (Only appears on Universal Studios' birthday)
 * A species that looks like a alien-plant hybrid [Original character]
 * A green-blue like character that kinda looks like Frankenstein [Original character]
 * Biff Tannen [Back To The Future]

SpongeBob Landpants

 * SpongeBob SquarePants [SpongeBob SquarePants]
 * Patrick Star [SpongeBob SquarePants]
 * Squidward Tentacles [SpongeBob SquarePants]
 * Eugene Harold Krabs [SpongeBob SquarePants]
 * Sheldon J. Plankton [SpongeBob SquarePants]
 * An Elf from "Road To Christmas" special [SpongeBob SquarePants]🎄
 * Raarg [SpongeBob SquarePants]🎃
 * Patchy The Pirate [SpongeBob SquarePants]
 * Burger Beard [SpongeBob SquarePants]🎃 (replaces Patchy The Pirate)
 * Glovey Glove [SpongeBob SquarePants]⭐ (appears on March and June)

N. Sanity Island

 * Crash Bandicoot [Crash Bandicoot]
 * Coco Bandicoot [Crash Bandicoot]
 * Crunch Bandicoot [Crash Bandicoot]⭐ (appears only on November)
 * Dr. Neo Cortex [Crash Bandicoot]
 * N. Brio [Crash Bandicoot]
 * N. Gin [Crash Bandicoot]
 * Tiny Tiger [Crash Bandicoot]🎃
 * Dingodile [Crash Bandicoot]
 * Alternate Tawna [Crash Bandicoot]🎄
 * N. Tropy [Crash Bandicoot]
 * Nitrous Oxide [Crash Bandicoot]🎃
 * Lab Assistant [Crash Bandicoot]🎃

DreamWorks Landing

 * Shrek [Shrek]
 * Princess Fiona Human [Shrek]
 * Princess Fiona Ogre [Shrek]🎃
 * Gingerbread Man [Shrek]
 * Lord Farquaad [Shrek]🎃
 * Fairy Godmother [Shrek]🎄
 * Rumpelstiltskin [Shrek]🎃
 * Puss In Boots [Shrek/Puss In Boots]
 * Kitty Softpaws [Puss In Boots]
 * Humpty Dumpty [Puss In Boots]🎃
 * Princess Poppy [Trolls]
 * Branch [Trolls]
 * Guy Diamond [Trolls]🎄
 * DJ Suki [Trolls]⭐ (appears only during Universal Studios' birthday)
 * Biggie [Trolls]
 * Prince Gistle [Trolls]🎃
 * Bridget [Trolls]🎃