Greymon

Greymon (グレイモン) is Champion form of Agumon.

Appearance
Greymon has the appearance of a large Tyrannosaurus-like creature, he dons a dark brown skull and sporting 3 horns, 2 on the sides and one long one on it nose, he is yellowish-orange in color and dark-blue stripes covering him. He has red eyes and has an overall intimidating look. His body seems to be muscular looking.

Red Greymon's appearance to be like other Greymons but it’s likely larger or similar size.

Digimon Adventure
In The Birth of Greymon,

In Kabuterimon's Electro Shocker,

In Ikkakumon's Harpoon Torpedo,

In Evil Shows His Face,

In Subzero Ice Punch!,

In The Legend of the DigiDestined,

In The Dark Network of Etemon,

In The Arrival of SkullGreymon,

In  Piximon Cometh,

In The Prisoner of the Pyramid,

In The Earthquake of MetalGreymon,

In Princess Karaoke,

In The Gateway To Home,

In Return to Highton View Terrace,

In Gatomon Comes Calling,

In The Eighth Child Revealed,

In Flower Power,

In Wizardmon's Gift,

In Prophecy,

In Enter The Dark Masters,

In Trash Day,

In The Ultimate Clash,

In Etemon's Comeback Tour,

In My Sister's Keeper,

Digimon Adventure 02
In Iron Vegiemon,

In The Emperor's New Home,

In The Captive Digimon,

In A Very Digi Christmas,

In Digimon World Tour, Part 2,

Trivia

 * In the credits ending, he is credit as Red Greymon.