Act 25 - After transforming for the first time, Sailor Chibi Moon grieves for Sailor Pluto. As she watches Sailor Moon, Tuxedo Mask, Sailor Mercury, Sailor Mars, Sailor Jupiter and Sailor Venus attacking Death Phantom together, Sailor Chibi Moon realises what it means to be a Sailor Guardian.
Act 26 - Sailor Mercury, Sailor Mars, Sailor Jupiter, Sailor Venus, Tuxedo Mask, King Endymion, Sailor Chibi Moon, Luna, Artemis and Diana return to 30th century Earth without Sailor Moon. When Neo-Queen Serenity and King Endymion emerge from the Crystal Palace, Sailor Chibi Moon runs to her mother. Sailor Chibi Moon's awakening revived Neo-Queen Serenity.
Neo-Queen Serenity gives her daughter a Silver Key and her own Cutie Moon Rod. Sailor Chibi Moon may only have the abilities of a trainee right now but she wants to fight with Sailor Moon. She uses the Silver Key to take herself to where she needs to go.
Sailor Chibi Moon arrives on behalf of Neo-Queen Serenity to help Sailor Moon and Tuxedo Mask destroy Death Phantom once and for all. Sailor Moon advises Sailor Chibi Moon to believe in herself and attack the planet with everything she has. Together Sailor Moon and Sailor Chibi Moon attack with their own Cutie Moon Rod using Double Moon Princess Halation against Death Phantom.
Sailor Chibi Moon races through the Space-Time Door to guide the others back to the 21st century.
Act 27 Part 2 - A Daimon attacks Sailor Moon, Sailor Mercury, Sailor Mars, Sailor Jupiter, Sailor Venus and Sailor Chibi Moon. The Daimon chases Sailor Moon and Sailor Chibi Moon. When the Daimon goes after Hotaru Tomoe, Sailor Chibi Moon dives her out of the way.
After the fight when Hotaru inquires who they are, Sailor Chibi Moon explains they are all Sailor Guardians each protected by their Guardian Planets and they protect the innocent. When Hotaru notices Sailor Chibi Moon's arm in injured, she places her hand on the wound as a power flows though her, she heals the injury.
Act 28 - After Hotaru explains to Sailor Chibi Moon that she has had her power since she was a little girl, Sailor Chibi Moon asks for her name.
Sailor Chibi Moon's Sailor suit is coloured bright pink. She has red-and-white barrettes on her bright pink odango pigtails with feather clips and a tiara. Her gloves are white with bright pink ends and cover most of her arms. She wears long pink boots.
- I am the Pretty Guardian trainee who fights for love and for justice. I am Sailor Chibi Moon and now in the name of the future moon I'll punish you.