Candace Flynn

Phineas Flynn and Ferb Fletcher
She mostly finds them annoying, and is obsessed about busting them (though she truly does care for them). She was worried about her brothers while they were in the Digital World during the battle with the Death Generals.

Stacy Hirano
Stacy is Candace's best friend. They have a very close relationship. Once, Candace had to choose either busting Phineas and Ferb or her friendship with Stacy, but at the end of the day, she chooses Stacy. Candace and Stacy are like sisters because they are there for each other.

Jeremy Johnson
Candace has a HUGE crush on Jeremy, but on several occasions, she had to leave their date to attempt to bust her brothers. Jeremy is accepting to her minor freakouts.

Perry the Platypus
Candace mostly finds him gross and useless but truly does care for him.

Isabella Garcia-Shapiro
Candace seems to have a normal friendship with her. Isabella's mom was the only parent not called by Candace to be busted

Vanessa Doofenshmirtz
They are sort of friends. A running gag with them is that they either talk, sing duets, or sing parodies of each other's songs. In "Carl: College Years" they share class and get on well.

Dirty Matt
Whenever Matt is about, Candace becomes stressed and terrified and her first concern becomes the safety of her brothers. She will immediatly drop whatever she is doing, including busting her brothers and hanging out with Jeremy, to ensure that Matt does not harm Phineas and Ferb. She is also unwilling to trust him in The Great Megalodon Hunt.

Lindsay Taylor
Candace is Lindsay's newest friend. They are sweet and nice to each other.

Carl
They are friends in the college, meanwhile Carl is doing post-grade she is starting studying there

Cutemon
Cutemon is more or less like Candace's partner, and she enjoys being with him.

Celestial Feelings
Candace is Chief Medical Officer Dr. Candace Flynn (presumably ranked Lieutenant Commander) aboard the USS Phineas, but takes the helm briefly after former Lieutenant Vanessa Doofenshmirtz leaves. She is joined by Dr. (Lieutenant Commander) Jeremy Johnson, who takes her to a jungle-like planet when the crew disembarks.

If Summer Only Lasted One Day
She officially gives up trying to bust Phineas and Ferb after Mrs. Flynn sees Phineas and Ferb's activities as something good and special. She spends time on a holodeck (that Phineas and Ferb make) with Jeremy. Her idea of a concert in the backyard is taken seriously as the event to finish off the last day of summer.

An Interplexing Future
She joins her brothers and their friends in a fight against a future Emperor Doofenshmirtz. Being that the events are 3 years after If Summer Only Lasted One Day, she is now 19 and in college.

Love's Full Blossom
It is mentioned that by this time (2025), Candace is married to Jeremy and that they already have Amanda Johnson as their first child.

Phineas and Ferb: The Threat to Earth
Candace appears as a non-playable character in the game. She is hypnotized by Skrullard and becomes the boss of Level 03.

Phineas and Ferb: Forever Summer
She and her friends and family are older and the setting is in the future in this series and she is married to Jeremy. She has three kids, Xavier, Fred, and Amanda.

Big Time WoW!
Candace records the Big Time Rush songs Every Day Popstar and What I Was Waiting For.

Candace's Toy
Candace hears about the Candace Talking Plush and thinks Phineas and Ferb created it.

Return of the 50 Foot Sister
In this episode, Candace finds a beautiful necklace (which, unknown to her, is cursed) and puts it on, causing her to grow 50 feet tall.

Judy and Lizz, Toys: A Crossover
In this fan-fiction movie, young Candace Flynn plays Ally Corey, a young girl with a big imagination.

Candace and Stacy Theme Adventure
She's the main character of this spin-off.

Candace in Wackyland
She chases the last Do-Do and is the Porky Pig and Do-Do counterpart series. (Phineas and Ferb goes Looney Tunes)

Speedy Phineas (cartoon)
She also chases Speedy Phineas to the ACME Hardware.

New Super Flynn-Fletcher Bros!
She appears in every episode. She doesn't play a big role in the series finale, though.

Total Drama WorldWide (Phineas and Ferb Cast)
Candace is playing an antagonist role by hurting people then faking sadness to get people on her side. Ferb and Wendy are the only ones on her team who knows what she's up to. She has made it to the Final 10. Everyone learns she's evil in Ukraine on Your Parade. Her strength played to her advantage when she broke the target with a shot put ball gaining her Final 5 spot. She was almost eliminated in From The Cancun but it was a Reward. She was eliminated in Sweet Home Alabama (Finale the Final Episode) when she and Lisa fought for a spot in the Final 2 and Candace fell in the water. Commupeance was served for her attitude in the season when crocodiles and water wolves (an invention by Chef) attacked her.

The Sonic the Hedgehog Game
Candace appear in a Mini-Game called "You're so Busted!", In Which Players beat her from chasing Phineas and Ferb, if you beat her, she surrender and run away. Candace also appear in "Jeremy's Mayhem" as Damsel in Distress, Jeremy must rescue her from being transformed into coachroach. Candace makes a cameo in "Dodgeball Freeze" in a window talking to Stacy in the Telephone. Candace also appear in the end of Intro saying "Mom! Phineas and Ferb are making a Video Game."

Camp Phineas Series
In "Stacy's Secret", she is Stacy and Jenny's best friend. In the story "Candace's Lie", she lies to her friends by saying that her brother is a wikia contributor, when he obviously isn't. Candace lied because she wanted to make friends and she was sick of Mindy talking about her horror story with The Regurgitator (and this guy is not this guy).

TotalDramaRox97's Series
Candace meets a boy named Connor. At first she doesn't like him since she thinks he's like her brothers. She soon makes friends with his sister Caelan. She starts to like Connor in the epsiode Once And For All when he helps her bust Phineas and Ferb for not wearing helmets. She grows to like him more and more. She is racing with Stacy in a race around the world and is in the back of the pack

The Song of Flames
Candace is a protagonist in the fanfic. She befriends the legendary Candace is a protagonist in the fanfic. She befriends the legendary Pokemon Cobalion three years after Doofenshmirtz becomes the emperor of Danville thanks to Darkrai and Zekrom.

The Bitterness Trilogy
Candace's alternate self is a character in this series. (She doesn't appear in the first book.)

In The Bitterness of Candace Flynn, she is a new antagonist who Alternate Phineas and Ferb must convince to return to the good side.

In The Bitterness of The Empire [SPOILERS], she is a Resistance agent who tries to protect her brothers when she can. (Not much is known about her role at this time.)

The Adventures of Irving and Friends
She is a major Character and has shown up in Bugging Out, Secret Agent Irving, Candace On The Couch, Fired Fanboy, Irving Who, Irving's Fan and Love, Danvillian Style.

The Shark of Danville Harbour
Candace and Constance swich places and different times when they try to save their brothers Phineas and Patrick. Candace is teleproted to Danville right before the Harbour Days Festival and uses a song to scare the shark away so Candace can go home.

A British Werewolf in Danville
Chaperones the trick-or-treaters, and ends up getting bitten. She then becomes a highly dangerous threat.

Phineas and Ferb: The 1st Return
Alternate Candace is still leader of the Resistance. Greatly hurt by a recent event in her life, she seeks the two boys Phineas and Ferb from the original dimension.

Phin Wars
She is a playable character as Princess Candace.

Total Phineas
She is a contestant in this game show.

The Stacy Hirano Show
Candace is a main character in the spin-off series The Stacy Hirano Show. The show will follow Stacy Hirano and Candace as they move out on their own and begin their first year at Danville Community College. In this spin-off Stacy has been recruited by Carl the Intern for his all teen secret agent organization. Candace has no idea Stacy is a spy.

Stories of the Vanished Man
According to the series, Candace is Perseus Flynn's biological daughter.

Who's My Daddy?
Candace shares her harsh experience when her biological father still existed in her life.

Candace The Driver
Like Driver Parallel Lines, Candace Must Finish All missions.

Goofy Candace
She acts like fellow Disney character Goofy. Included an emmy award winning episode called How to Bust Your Brothers.

The List of Secrets
She will appear in the story as a somewhat major character. She forms a good friendship with Vanessa in the story.

Carl: College Years
She and Stacy are at Danville college studying for translator.

Candace Flashbacks
Candace has a major part in Candace Flasbacks, where while Mom is getting the home movies to DVDs, and P&F are doing nothing, She tells Stacy about her younger years in flashbacks. She also sings 5 songs from the What Force Is That? album, notably Some Division Force.

Phineas and Ferb Xros-Over series
Candace plays a support/minor role in the series and when Phineas and Ferb do something she just stays quiet.