Peach's Parasol

Peach's Parasol (also called Peach's Umbrella) is what Princess Peach uses to defend herself and to glide in the air. In some games, it replaces and acts like her floating dress ability from Super Mario Bros. 2. Peach has been using this parasol ever since she was a baby.

Super Mario RPG: Legend of the Seven Stars
Her parasol first appears in Super Mario RPG: Legend of the Seven Stars, where it is a weapon able to be purchased from the shop in Seaside Town after Yaridovitch is defeated, and colored blue. She earlier uses a different, pink one to sneak out of Mushroom Castle.

Mario Party 3
Peach is seen using her parasol in the Mario Party 3 minigame Parasol Plummet.

Super Smash Bros. series
The parasol appears in Super Smash Bros. Melee where it is a special move. She can glide in the air with it and hit opponents. It also appears in Super Smash Bros. Brawl, Super Smash Bros. for Nintendo 3DS / Wii U, and Super Smash Bros. Ultimate, with the same function and its Super Paper Mario design. In the Subspace Emissary in Super Smash Bros. Brawl, Peach briefly carries the parasol around while strolling on the Halberd's deck, and later gives it to a just-restored Mr. Game & Watch shortly after scolding him.

In Super Smash Bros. Ultimate, Daisy now owns a parasol identical to Peach's, albeit reused from Peach's alternate color in Super Smash Bros. for Nintendo 3DS / Wii U.

Super Mario Sunshine
Princess Peach uses this parasol in Super Mario Sunshine to protect her from the dangerous heat, and she is also seen floating down with it in the ending.

Super Mario Galaxy 2
Her parasol makes an appearance in Super Mario Galaxy 2, where if the player attempts to shoot Star Bits at or jump on the princess, she will use her parasol to guard.

Super Mario 3D Land
Peach's parasol makes a small cameo in Super Mario 3D Land, where she is whacking a Goomba Tower with it, as shown in the letter Mario gets before starting World 6.

Super Mario Maker
Peach's parasol appears in Super Mario Maker when her costume is selected. It appears while she's jumping and when performing her unique pose.

Super Princess Peach
The parasol Peach uses in Super Princess Peach actually has a mind of its own. It is implied in-game that this parasol was once a human being until two sorcerers' magic transformed him. She can whack enemies with him and give him various upgrades. Perry can even eat enemies to refill the Vibe Gauge.

Yoshi's Island DS
Baby Peach uses her parasol in Yoshi's Island DS, where it's her special move. Yoshi can improve his flutter jump with it, and makes it easy to ride winds.

Super Paper Mario
The parasol appears in Super Paper Mario, where Peach can use it to float and defend herself while crouching. In later games, the parasol has retained its design from this game.

Paper Mario: Color Splash
In Paper Mario: Color Splash, Peach can be seen holding the parasol when she first arrives at Port Prisma, along with in official artwork for the game. In the digital manual, when asked where she keeps the parasol, Peach claims that it is none of the viewer's business.

Mario Kart series
The parasol appears in Mario Kart 7, Mario Kart 8 and Mario Kart 8 Deluxe, where it is one of the available gliders.

Mario & Luigi: Dream Team
In Mario & Luigi: Dream Team, the parasol makes a cameo in the credits.

Mario Golf: World Tour
In Mario Golf: World Tour, Peach wields her parasol in her victory animation whenever she gets a Birdie or an Eagle. It is implied to be magical, as after waving her parasol around for a bit, she then swings it and has her miniskirt change into her trademark dress.

Mario + Rabbids Kingdom Battle
In Mario + Rabbids Kingdom Battle, after the Icicle Golem freezes Mario's team, Peach uses the parasol to glide through the air to save them.

Trivia

 * Peach's Parasol appears as an Umbrella in the Animal Crossing series.