Butterfly

Butterflies are flying insects that appear in many Mario series, though they typically aren't really important. They usually appear in groups. There are also many creatures that have the similar appearance to a butterfly, such as Tippi from Super Paper Mario (who is occasionally actually classified as a butterfly, though Francis once refers to her as a "digibutterfly").

Super Mario 64
In Super Mario 64, there are a few stages (as well as outside Princess Peach's Castle) where there are Butterflies flying around. When Mario punches one of them, one of two things will happen: the Butterfly will either turn into a 1-Up Mushroom or become a large metal ball and chase Mario until it hits him, or hits something in its way. In this game, Butterflies are purple with white spots on their wings.

Super Mario Sunshine
In Super Mario Sunshine, Yoshi could eat certain types of butterflies to get different items. Yellow Butterflies yield regular coins, blue Butterflies yield Blue Coins, and green Butterflies yield 1-Up Mushrooms. In this game, Butterflies are always found fluttering around in groups, and are never by themselves like in Super Mario 64.

Super Mario Galaxy 2
In this game, a number of shimmering golden Butterflies appear on the Starting Planet in the Sky Station Galaxy (three also appear on the Peewee Geo Planet later in the galaxy), but only while Co-Star Mode is active. The player can use the Co-Star Luma to spin the Butterflies in the same way as they would any other object. When spun, each Butterfly will release three Star Bits each, after which they will completely disappear.

Super Mario World 2: Yoshi's Island
Butterflies made their first appearance in Super Mario World 2: Yoshi's Island, where they only appear as part of the scenery and have no major purpose.

Yoshi's Story
In Yoshi's Story, Butterflies reappear as part of the scenery, however numerous Butterfly sub-species such as the Teehee Butterfly and the Power Bee (known as Happiness Butterfly in Japan) appear as edible health restoring creatures.

Super Mario RPG: Legend of the Seven Stars
In Super Mario RPG: Legend of the Seven Stars, Butterflies first appear in the opening with Princess Peach right before she is kidnapped. They later appear as part of the scenery in some areas of the game.

Mario & Luigi: Bowser's Inside Story
In Mario & Luigi: Bowser's Inside Story, a caterpillar-like creature named Durmite appears as a boss twice in the game, however during the second fight it is revealed that her real name is Wisdurm and that she is a actually a legendary Star Sage and after being beaten the second time she turns into a Butterfly. Also in the game a species of Snifit with Butterfly wings appears during battles with Flifits.

Mario Party
Butterflies also made a small appearance in Mario Party; they are shown on the mini-game Ground Pound.

Mario Party 4
They later appear in Mario Party 4 in the mini-game Butterfly Blitz. They have a small but major role; they are worth points when characters catch them. There are three kinds of butterflies that give players points to win; Yellow Butterflies are worth at least one point, Red Butterflies are worth two points, and Blue Butterflies are worth a whopping three points.

Mario Party 8
A Butterfly also made a very brief appearance in the Mario Party 8 mini-game, At the Chomp Wash. When a Chain Chomp sees it, the butterfly causes the Chain Chomp to run into several buckets of paint.