https://www.fimfiction.net/story/529135/40-years

It's a collaboration of writers that wrote a story about all five generations of My Little Pony getting together the big bad: Grogar!!! It was also created in celebration of 40 years of the MLP IP, which is crazy in its own right.
(i helped with some chapters)

Elloo check out this really cool video that Faolan made, its a collaboration of all MLP Gens