Welcome to I Wanna be the Cuphead: Just Deal with the Dancing Devil!
This is like Cuphead, but combined with IWBTG and BATIM, with a whole lot of crossovers!
Also, RaG levels aren't available for now.
Levels marked with an asterisk (*) are shmup bosses.
Bendy (can be unlocked by beating him in The Dancing Devil)
Mugman (can be unlocked by completing Normal Mode)
BubBub (can be bought from the Store of Secrets)
Nessy (can be bought from the Store of Secrets)
Four (can be unlocked by beating him in The Battle for BFDI)
TSRI2 (can be unlocked by defeating TSRITW IRL)
Chapter One: The "Cliché" Grassy Plains
The Root Pack in Botanic Panic
Goopy la Grande in Ruse of an Ooze
Ribby and Croaks in Clip Joint Calamity
Cagney Carnation in Floral Fury
Hilda Berg in Threatenin' Zeppelin*
In-Between Chapter One and a Half
Bendy in The Dancing Demon
Chapter Two: The Carnival of Chaos
Baroness von Bon Bon in Sugarland Shimmy
Djimmi the Great in Pyramid Peril*
Grim Matchstick in Fiery Frolic
Wally Warbles in Aviary Action*
Beppi the Clown in Carnival Kerfuffle
In-Between Chapter Two and a Half
Loomy in Illuminanan Confirmed!
Chapter Three: How Did This Happen?
Rumor Honeybottoms in Honeycomb Herald
Werner Werman in Murine Corps
Dr. Kahl in Junkyard Jive*
Captain Brineybeard in Shootin' and Lootin'
Cala Maria in High Seas Hi-Jinx*
Sally Stageplay in Dramatic Fanatic
The Phantom Express in Railroad Wrath
In-Between Chapter Three and a Half
Sketchbook in Get Creative!
Chapter Four: The Devil's Casino
King Dice in All Bets are Off!
The Devil in One Hell of a Time
Ending Cutscene (or is it?)
Chapter Five: Bloonbustin'
Monkey in Decisive Dilemma Dimension
Road Killer in CHICKEN!*
Blitzy in Bingo Boss
Holiver in Wendithap'n?
Jack Inthebox in YOU DON'T KNOW JACK!!!
Plot Twist Mode
Chapter I: Not What It Seems
Starch-Lord in Starch Wars
The Tomb Trio in Grave Danger
Grass Knuckles and The Smash in Can't See Me
The Flowerpuff Girls in Bloom and Doom
Meester and Midnight in Books on a Blimp*
Chapter II: Carny Catastrophe
Impfinity in Candy Witch Imp Saga
The Great Zucchini in Presto Change-o!*
Captain Combustible in It Burns Burns Burns!
Tony the Talking Clock in A Journey through Time*
Beppi 2.0 in Carnival Kerfuffle Again
Chapter III: Doomageddon
Shrignold in Pesky Bee!
Cat Army in Crash Arena Turbo Stars
Dr. Undergear in Nuts and Bolts!*
Captains Deadbeard and Flameface in Pirate's Unlife for Me!
Neptuna in Mirrored Match*
Sally Stageplay 2.0 in Dramatic Fanatic: The Sequel
Asdf Express in I Like Trains!
Chapter IV: TSRITW's User Page
Plucky Clover in Feelin' Plucky, Punk?
TSRITW in Quadrilateral Catastrophe
Chapter V: Boss Blitz
Porkrind in Potion Power!
Pepperus Piggy in Epic Yarn
Lincoln Loud in One House with Eleven Kids
RubRub in The Entire Alphabet
Four in The Battle for BFDI
TSRITW IRL in ???
Chapter VI: The Glitchy Matrix
Five Neighbour Machines in Fandom Frenzy
M.E.R.G. in Blocky Battle
Cuphead in Walking Down Memory Lane
Colin the Computer in The Digital Monster
Chapter VII: The Jackbox Crossover
Party Pack 1 in FibSwatSpudful
Party Pack 2 in Quidiot EarCorp 2
Party Pack 3 in Trivia Fakin' Quispionage K.O.
Party Pack 4 in Brackoodle Monsternet 3*
RubRub's Warehouse of Weaponry
Pepperus Piggy: Costume Creator
The Store of Secrets (owner: TSRITW IRL)