Rainbow Dash is brilliant but impulsive, Twilight is calm and reserved. They are two of the best ponies the United Federation has. They also hate it each other. This is how they became the fastest of friends, and saved the universe in the process.
A nerd who thought it would be cool to, with the help of a few equally insane buddies adapt the entire Marvel Universe (with some DC Comics thrown in for kicks) with My Little Pony...wish me luck