Pinkie frequently performs cartoonish feats, such as eye-bulging, wild takes, and unusually angled cuts into the frame. Her merry skips resemble Pepé Le Pew's, particularly in Griffon the Brush Off. Her costume and waddle in Dragonshy are reminiscent of Daffy Duck's four-legged body in Duck Amuck.
On several occasions, Pinkie breaks the fourth wall and shows awareness of cinematic elements. For example, at the end of Over a Barrel, she pokes her head through the iris wipe to grumble about Twilight's friendship lesson, and in Magic Duel, she stretches the iris wipe wide open and climbs into the black screen to protest about her vanished mouth.

Love of parties
Pinkie Pie is first introduced as a talented and avid party-thrower. She throws a party for Twilight Sparkle in Friendship is Magic, part 1, a welcome party for Gilda in Griffon the Brush Off, and a birthday party for Gummy in Party of One (and even an "after-birthday party" the following day). Pinkie is even shown to throw parties on completely random occasions, such as a "finish ringing the school bell" party in Castle Mane-ia.

In The Cutie Mark Chronicles, Pinkie says she got her cutie mark when she was inspired to throw her first party for her glum family.

Party cannon

Pinkie Pie with her party cannon.
In Sweet and Elite, Pinkie organizes a birthday party for Twilight on very short notice, putting up decorations in very little time with her "party cannon". The cannon would become a running gag throughout the show, up to the point where Pinkie even uses it to fight off the changelings in A Canterlot Wedding - Part 2. The cannon is used again in The Crystal Empire - Part 1, Games Ponies Play, and Pinkie Pride.
Insecurity

Pinkie Pie not quite feeling like herself.
On occasion, Pinkie Pie shows an insecure side of her personality, doubting her friends or herself. In Party of One, she believes her friends to be unfaithful, causing her hair to "deflate" and her coat color to fade to a grayish pink. She adopts several inanimate objects as new friends, pretending that they are real.
Pinkie Pie tries to prove that she is responsible in Baby Cakes by begging Mr. and Mrs. Cake to let her babysit their children. When the Cakes eventually agree, Pinkie Pie quickly becomes overwhelmed by the task and shows doubt in her ability to handle the responsibility.

In A Friend in Deed, Pinkie Pie tries to befriend Cranky Doodle Donkey, despite his many rejections. She only succeeds in making a friend out of him by reuniting him with Matilda.

In Too Many Pinkie Pies, Pinkie Pie creates duplicates of herself in order to make time for her friends. However, when Ponyville becomes overrun by dozens of Pinkie Pies, Pinkie Pie soon wonders if she's even the real Pinkie Pie.

In Pinkie Pride, Pinkie Pie feels outdone and replaced by Cheese Sandwich and doubts in her own partying abilities. She gives up party planning and tries other tasks, but fails at them. Her faith in herself is only renewed when