The Transformation Power Pens (変換パワーペン Henkan Pawā Pen) are devices that look like ordinary pens to civilians. It allows Tensaimi Aquano, Hono Akano, Itsuki Oak, and Amaimomo Yasashi-Sano to transform into Cure River, Cure Flare, Cure Timber, and Cure Lovely respectively. Twilight gave Tensai, Hono, and Itsuki the devices in SSPC03 (for Tensai), SSPC05 (for Hono), and SSPC07 (for Itsuki). Dusk gave Amaimomo the device in SSPC09. The Cures must say "Pretty Cure! River/Flare/Timber/Lovely Power, Make Up!" They carry around the pens as normal writing tools.
The pens appear in the third, fifth, seventh, and ninth episodes. The pens have each Cures' signature color and emblem. (For example, blue and a river symbol for Cure River, red and a fire symbol for Cure Flare, green and a lightning symbol for Cure Timber, and yellow and a heart symbol for Cure Lovely.) The pens stay the same, whether they are in Cure form or in civilian form.
The Transformation Power Pens are used to transform Tensaimi Aquano, Hono Akano, Itsuki Oak, and Amaimomo Yasashi-Sano. To transform, Tensai, Hono, Itsuki, and Momo must say "Pretty Cure! River/Flare/Timber/Lovely Power, Make Up!" and either make a circular motion with the pen (when they are in their school unifoms) or hold the pens after saying the transformation phrase (when they are not in their school uniforms.)
- The Transformation Power Pens are the first pen-like items existing in the Pretty Cure universe.
- They are the second item to have a different action performed by the Cure depending on what they are wearing.