Eiffel

Eiffel is the placeholder name of a male Earth pony with a dark blue coat, light blue mane and tail, blue eyes, and a cutie mark either of two drums, of a scroll, of an airstream cutting through two clouds, of two objects which are identified indirectly by Little, Brown's Mini Pony Collector's Guide and Gameloft's mobile game respectively as candies and as bows, or of a strawberry and a bunch of green grapes.

Design
He shares his design and eye color with Dr. Hooves, Lucky Clover, S04E08 Unnamed Earth Stallion #1, S01E26 Unnamed Earth Stallion #2, "Melilot", and S05E12 Unnamed Earth Stallion #1, shares his design with Meadow Song, S05E06 Unnamed Earth Stallion #13, "Hill Song", S05E06 Unnamed Earth Stallion #15, and sometimes S05E06 Unnamed Earth Stallion #17, shares his tail style or design with S04E20 Unnamed Earth Stallion #4, S04E20 Unnamed Earth Stallion #7, and S04E20 Unnamed Earth Stallion #6, shares his mane and tail style and eye color with Crescent Moon, Buddy, and S05E05 Unnamed Pegasus Stallion #1, shares his airstream-and-clouds cutie mark and sometimes mane and tail style with "Thorn", shares his mane and tail style with unicorn Discord, shares his tail style and eye color with Tight Ship and "Pine Breeze", shares his mane style with "Lance" and sometimes S04E20 Unnamed Earth Stallion #5, shares his tail style with S04E08 Unnamed Earth Stallion #2 and "Brass Blare", shares his scroll cutie mark with Royal Ribbon, Sealed Scroll, "Written Script", "Silver Script", S04E20 Unnamed Unicorn Stallion #1, "Hercules", "Affero", and sometimes Tall Order and "Lavenderhoof", shares his airstream-and-clouds cutie mark with S04E08 Unnamed Pegasus Stallion #1 and "Bluebell", and usually shares his strawberry-and-green-grapes cutie mark with Ruby Splash.

Season one
Friendship is Magic, part 1

Applebuck Season

Boast Busters

Winter Wrap Up

The Show Stoppers

The Cutie Mark Chronicles

Season two
The Mysterious Mare Do Well

The Super Speedy Cider Squeezy 6000 (drums cutie mark)

A Friend in Deed

Season three
The Crystal Empire - Part 1

Magic Duel

Season four
Simple Ways (scroll cutie mark)

It Ain't Easy Being Breezies (airstream-and-clouds cutie mark)

Leap of Faith (candies-or-bows cutie mark)

Trade Ya! (strawberry-and-green-grapes cutie mark)

Appearances
Times are approximate.

IDW comics
He appears on My Little Pony: Friends Forever Issue #9 page 5.

Software
He appears in the outro of Adventures in Ponyville.

Storybooks
He appears in the Target Canterlot Twilight Sparkle Animated Storyteller's fourth storybook Applebuck Season, an adaptation of the episode of the same name.