After personally inspecting Ratchet, Clank and Qwark proof traps in an unknown galaxy on his ship, Lawrence 'accidentally' opened up a trap door into the nearest planet. This wouldn't be a problem if Dr. Nefarious wasn't standing on it. Unfortunately he landed near Princess Twilight.

Crossover with the Ratchet and Clank games. Takes place after All 4 One.
Rated T for two mild swear words, one of which is cut off.
Suitable for everyone else if the first few games' ratings are to be believed.

Second in a pseudo one-shot series I like to call: Slightly Random Pony and Even More Random Game Character. Or SRPEMRGC or Pony and VGC for short. Where every character will be treated with respect, unless that goes against the characters existence/purpose.
They won't have an overarching plot, each story can be enjoyed on its own. They take place in the same universe though.
1: Rainbow, Big and Froggy
2: Princess Twilight and Dr. Nefarious
3: Applejack and Moneybags
4: Lightning Dust and Polar