Rivet

Rivet and Rick Shaw are the placeholder names of a male pony who appears usually as an Earth pony and occasionally as a Pegasus. He has a light brown coat, brown mane and tail, and blue eyes. His cutie mark is a hammer and two nails in most appearances, is three raindrops in one appearance, and appears to be a shield in another appearance. He has a speaking role in the episodes The Mysterious Mare Do Well and Equestria Games.

Design
He shares his color scheme with "Jim Beam".

His beard stubble is only sometimes present, similarly to the beard stubble of Jack Hammer and the mustache of Lucky Clover.

His cutie mark is frequently obscured by his clothing and/or equipment, usually his construction tool belt or his cabbie uniform's checkered band and his taxi's harness.

Depiction in the series
In season one, he appears as a Pegasus with beard stubble in Sonic Rainboom.

In season two, he appears as an Earth pony without beard stubble in Sisterhooves Social, as an Earth pony with beard stubble in The Mysterious Mare Do Well, as an Earth pony without beard stubble in Putting Your Hoof Down, and as a Pegasus with beard stubble in Hurricane Fluttershy.

In season four, he appears as an Earth pony without beard stubble in Rarity Takes Manehattan, as a Pegasus without beard stubble in Rainbow Falls, as an Earth pony first without then with beard stubble in Pinkie Pride, as an Earth pony without beard stubble in Somepony to Watch Over Me, and without beard stubble in Equestria Games.

Appearances
Times are approximate.

My Little Pony (mobile game)
He is an unobtainable and non-playable character in Gameloft's mobile game, which features him as a construction worker outfitted as in Sonic Rainboom, The Mysterious Mare Do Well, and Pinkie Pride.

Quotes
"Actually, she saved all of us! We owe her our lives!"

- The Mysterious Mare Do Well

"There isn't time!"

- Equestria Games