All Koopalings in New Super Mario Bros. Wii

The seven Koopalings appear as world bosses in New Super Mario Bros. Wii, in fixed order:

1. Larry Koopa (World 1)
2. Morton Koopa Jr. (World 2)
3. Wendy O. Koopa (World 3)
4. Iggy Koopa (World 4)
5. Roy Koopa (World 5)
6. Lemmy Koopa (World 6)
7. Ludwig von Koopa (World 7)

Each has a distinct attack pattern and shell color. Defeating all seven unlocks World 8 (Bowser's Castle).