A free app for Android, by Lunime.

Neko Gacha – Cat Collector is a casual game in which you will be collecting various cute cats, turning them into your favorite pets! In this game, you can collect over 150 different unique, kawaii pets, from various series such as My Melody, My Heart, and Neko Gacha! You can turn them into your favorite pets and take them with you everywhere you go.

There are many ways to collect. You can play mini-games, fight against bosses, or do quests. You can even make your own team of cats, and go on an adventure! It’s all free to play.