Eiffel 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, the Cutie Mark Crusaders' Hearts Strong as Horses shadow, 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 Mane 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 D