Four generations of ponies, four generations of heroes, four generations of friendship. Discord has managed to return and he's kidnapped Princess Celestia, so the Mane 7 try to follow him. However, they instead find that he's managed to cross between whole universes to recruit a massive team of villains as revenge. Now, many other ponies across different universes are put at risk, and they must all work together to defeat this team of villains through their generations of friendship.

Features Generations 1, 2, 3, and 4 of My Little Pony shows. In reality, My Little Pony Tales wasn't G2, but G1, but I personally consider it as G2 because shut up.

Also, for G4, it takes shortly after the Crystal Kingdom episodes. I don't know when exactly they'd take place during the others. Maybe sometime after they ended?