Etsy shop now open!
No, not my OC who is also named Tex-- the Pony Of The Month for the MLP-Earthen-Wonders DA group! I already headcanon various G1 Ponies as being the parents of G4 Ponies, so it's not too hard to fit G1 Tex in as an ancestor of Fluttershy, since they essentially have the same pastel yellow/pink/green colors. I reckon he was Fluttermom Posey's great-great-something grandfather, who explored Out West.
...As a devout Texan, I am however compelled to point out that G1 Tex's cutie mark is somewhat inappropriate to his name, since There Ain't No Saguaro In Texas.
Tumblr version here.