Greymon

Greymon
Greymon is a dinosaur digimon, more closely modeled after the classic, flat-footed, upright depiction of a theropod dinosaur. It has a well muscled chest and forearms, orange skin with blue stripes, and a brown helmet with antler like horns on the side and a single horn on the nose - making it resemble some sort of fusion between a Allosaurus and Ceratosaurus. It is approximately 15 to 20 feet tall.The name "Greymon" comes from a misspelling of the English word "great".

Digimon Adventure
A different Greymon appeared as a slave of Etemon, fighting Tai's Greymon in an arena.

Digimon Adventure V-Tamer 01
In the Digimon Adventure V-Tamer 01 manga series, a Greymon worked in Hospitown with two Centarumon and a Meramon. They helped to take down Tuskmon when he and Cyclonemon raided Hospitown.

Another Greymon was an old partner to Neo Saiba, who threw him away and who digivolved into MetalGreymon.

Digimon Next
Another Greymon was the parter of a Tamer named Saitou, which was much larger than Tsurugi's, only it was defeated.

Digimon World
Greymon can be digivolved from Agumon. Agumon can digivolve to Greymon by having Off.100, Def. 100, Speed 100, Brains 100, 30g, 0 or 1 care mistake and as a bonus condition you have to have 90% disclipline. Greymon can further digivolve into a MetalGreymon or SkullGreymon. Greymon, as well as several other Digimon, is frail in cold conditions and cannot last long in Freezeland. A wild Greymon appears in front of Jijimon's house after a prosperity rating of 15 or higher. He forces a fight against you, and promises to join the city if he is defeated. Greymon runs the Arena Tournament, and sets the dates for specific tournaments.

Digimon World 2
Greymon digivolves from Agumon, and can digivolve to MetalGreymon, MasterTyrannomon, or SkullGreymon. It can also be found with Apemon and ShimaUnimon on the fifth or so floor of a domain after the first Blood Knight attack.

Digimon Digital Card Battle
Greymon is the last opponent in Beginner City's Battle Arena after you beat A. He is a Red Card.

Digimon World 3
All of the starter Digimon can digivolve into Greymon. He is also The most powerful champion Digimon card. It is a red Champion Digimon card with 20/20.

Digimon World Data Squad
http://digimon.wikia.com/wiki/User:Maitkarro/DW_Data_Squad#Greymon

Digimon World DS
Greymon digivolves from Agumon at level 15 and 60 fondness, and can digivolve to MetalGreymon at level 25 with 80 fondness.

Digimon World Dawn/Dusk
Greymon digivolves from Agumon, and can digivolve to MetalGreymon. Greymon can be found at Task Canyon.

Digimon World Championship
Greymon can digivolve from Agumon or BlackAgumon with 6 battles, and can digivolve to MetalGreymon with at least 10 battles, MetalGreymon (Virus) with 30 Vaccine AP and 8 battles or SkullGreymon if you pass time

Attacks 
 * Nova Blast (Mega Flame): Fires a giant fireball from his mouth. In Rumble Arena 2, this instead acts as a flamethrower.
 * Horn Impulse: Rapid, repeated strikes with his horn.
 * Great Horns Attack (Great Antler): Slashes enemies with his horns.
 * Great Horns Bash (Great Horn Attack): An upward ramming with his horns.
 * Grey Tooth: Bites enemies with his razor sharp teeth.
 * Tail Crash: Pummels enemies with his tail.

Variations / Subspecies 
 * BlackGreymon
 * GeoGreymon
 * Greymon X
 * RedGreymon

Greymon X
Greymon X is a Greymon modified through the X-Antibody.

Attacks  Variations / Subspecies 
 * Nova Blast
 * Mega Burst
 * Great Antler
 * Greymon