If you are thinking of built the factory, that is unknown. But the actual creating the story of the Rainbow Factory in the form of a song, was a famous brony named WoodenToaster aka Glaze when entering a contest as to where rainbows come from. He got 2nd place for it, but ended up creating one of the most famous songs, and memes in the fandom.
Rainbow Dash
Rainbow Dash is a pegasus, which, in the MLP: FIM universe is one of the three main races of pony.
Rainbow Dash and Fluttershy
Yes she is. She has wings.
Rainbow Dash and Fluttershy
Rainbow Factory refers to a dark My Little Pony fanfiction in which rainbows are made by a process that involves killing pegasus ponies who fail their flight tests. The title is likely a reference to glue factories which made glue from animal connective tissue, primarily from horses.
Rainbow Dash is a fast, wild kind of pegasus. Therefore, her opposite would probably be Fluttershy, since she's more of a calm, shy pegasus.
Rainbow Centre Factory Outlet ended in 2000.
Rainbow Centre Factory Outlet was created in 1982.
The rainbow factory is owned by Rainbow Dash and Fluttershy (pretty weird that fluttershy is in there huh). Its workers include Woodentoaster and Bronydanceparty followed by others.
No. Rainbow Factory is not licensed My Little Pony material. It is a horror genre fanfiction that was published online.
Rainbow Factory