New Rainbow Islands
This game is titled Rainbow Islands Revolution in North America, Europe, and Australia and New Rainbow Islands in Japan.
Collect all seven jewels in a Story mode world. Defeat the Boss of that world then get the large jewel. Collecting each of large jewels from the default worlds will unlock three hidden worlds.
Play as Mike
Complete World 10 with every large jewel.
Play as Violet
Complete World 10 as Mike with every large jewel.