The scene: Galaxia gets rid of Sailor Iron Mouse and sends two new henchmen: Sailor Aluminium Siren and Sailor Lead Crow. At about this time, a red-headed toddler who looks a lot like Rini and only knows one word ("chibi!") shows up. She convinces Serena's family, via mind control, that she is Serena's little sis. Serena likes Chibi-Chibi a lot since she's too small and cute to be as bratty as Rini. The inners think that Chibi-Chibi is Serena and Darien's future daughter (sounds familiar) but Sailor Pluto assures them that's not the case, and she's not Rini's daughter either (though she looks a lot like Rini).
During a battle in Sailor Moon Sailor Stars, Chibi-Chibi puts her hands on Sailor Moon's moon wand and Sailor Moon gets a new attack. Later, Chibi-Chibi also becomes a scout (the youngest yet).
I'd like to go on and tell you what Chibi-Chibi's real identity is (I found it out by reading the "Secrets of Sailor Moon" in Animerica magazine) but to tell you would be a plot spoiler for so many of you Moonies. Yet, I'm fully aware that some Moonies frankly don't care about spoilers and want to know this priceless info. If you are one of those people, then click here to find out the truth, the whole truth, and nothing but the truth about Chibi-Chibi's true identity.
To see more pictures of Sailor Chibi Chibi Moon, click here.