Koe De Asobou - HeartCatch Pretty Cure!

Koe De Asobou - Heartcatch Pretty Cure (こえであそぼう ・ ハートキャッチプリキュア!) is a Nintendo DS game in which you can watch video clips from Heartcatch Pretty Cure!, record their own voices for each of the characters, add sound effects, and watch/listen to the results. It was released on November 11th, 2010.

The game has basically three modes, watching short clips (either with the original sound or the player's own), recording new voices, and adding sound effects/filters. There are only two save slots for new recordings.

In a bonus section, videos of the anime's opening and ending can be watched, and there's a list of which flower corresponds with each month and the flower words that go with it.