Doctor Whooves and Derpy Whooves lands on The Earth in human form. Meet various earth-threatening enemies and stop them

(And i must say i'm not that good at english since its not my first language but i'll try my best.)

Sparity stories for the thirty minute pony story tumblr. Tags subject to change.

1: Prompt #59: Rarity's the hero.
2: Prompt #61: The break up.
3: Prompt #67: Spike goes on an adventure with some or all of the Mane Six.
4: Prompt #69: Rarity's day off.
5: Prompt #76: An ambassador has come to Canterlot.

After a strange visit by Doctor Whooves at Twilight's library, she finds herself on a trip through Equestria's future after an epic pony war that ended up with the whole world being mutated and stuck in an endless late afternoon!