So I decided to make one too.
January: Y traps you and X in the tower and Z saves you both.
February: You catch Y trying to steal from you, Y runs, you and X give chase until Y crashes into Z.
March: You and X go to a convention and see Y cosplaying as Z.
April: You and X swap bodies due to Y's experiment! And Z is the special agent tracking you both.
May: You go to space with X and run into space pirates led by Y. You free Z whom they held hostage.
June: X goes out with Z, Y tries to crash their date but you stop Y.
July: You party with X but Z calls the police and Y breaks the stereo.
August: You and X go fishing, but you catch Y while X catches Z.
September: You and X gain superpowers, Y becomes a super-villain and brainwashes Z.
October: You watch TV with Z when suddenly X and Y come out of the screen and have a fight.
November: You and X catch Y trolling Z on the Internet. It doesn't end well for Y.
December: X accidentally sets off some fireworks in Y's house, but you and Z help Y fight fire.
Odd days (1st, 3rd, 5th etc): X is your favorite MLP character. Y is your least favorite NON-MLP character (or one of them). Z is your favorite MLP villain.
Even days (2nd, 4th, 6th etc): X is your favorite NON-MLP character (well, one of them). Y is your least favorite MLP character. Z is your favorite NON-MLP villain.
There, I hope it's not very confusing.
For example (hypothetic):
November 5th could be, You and Applejack catch Jar-Jar Binks (lol) trolling Discord on the Internet.
October 12th could be, You watch TV with The Joker when Batman and Flim/Flam come out of the screen and have a fight.