The Story of Reeny:

One day while Darien and Serena were having a special "moment" together a little Luna-P-Ball falls on Serena's head. As Serena falls slowly to the ground a little girl falls and kisses Darien!! "Where did you come from and get off my boyfriend!" shrieks Serena. "None of your business!" says the little girl. After awhile when Serena get's home she decides she's going to take a nap. Then she see's a little floating Luna-P-Ball. "What the heck is she doing here?!" Serena demands when she see's Reeny. "She's your cousin Reeny, don't you remember?" asks Sammy, Serena's little brother. "Since when do we have a cousin Reeny?!" Serena explodes. "Come on Serena! You don't remember? Reeny even brang her photo album!" replies Sammy. "Uhhhhhhh!" replies Serena.

Sailor Chibi Moon Powers

I haven't actually seen any of these powers yet because I live in Canada, so I'll just give an answer except I'll rephrase it in my own words.

*SMR Powers*

*Kitty Magic!*
Reeny says this to convert her Luna-P-Ball into almost any object.

*SMS Powers*

*Moon Prism Power!*
Reeny says this to transform into Sailor Chibi Moon.
*Pink Sugar Heart Attack!*
Sailor Chibi Moon says this to generate a row of heart from her special stick thingamagig. She directs the hearts at an enemy. Note: All this does is distract the enemy or annoy them?!

*SMSS Powers*

*Moon Crisis Power!*
Reeny says this to transform into Super Sailor Chibi Moon.
*Twinkle Yell!*
Super Sailor Chibi Moon says this to call upon Helios the Pegasus.
*Moon Gorgeous Meditation!*
Both Super Sailor Chibi Moon and Super Sailor Moon say this as they use there Kaliedo Moon Scopes.

Let's see some of Reeny's appearances:

Princess Chibi Moon
Sailor Chibi Moon
Super Sailor Chibi Moon
Reeny