G1 Ponies refer to the First Generation of My Little Pony toys, which were made over a 10-year period from 1982 to 1992. In 1997, production started again with the G2 (1997 to 2003) line, followed by G3 (2003-2010) and G4 (2010-Present).
G1 Ponies are further broken down by year, with each year featuring new ponies and variations of previous ponies. Some ponies were available through mail order and special offers and were available over the course of several years. Pony Wear outfits and playsets were also sold during multiple years.
Some G1 ponies have been re-released in anniversary editions. The original 6 ponies from Year 1 were re-released in 2008 to celebrate the 25th Anniversary of the My Little Pony line, and again in 2018 to celebrate the 35th Anniversary.