Dino King Battle: Taiko Kara no Hyouryuusha - Aru

Irisu:
Defeat her during the story mode, the battle occurs as part of the story.

Nano:
Defeat her during the story mode, the battle occurs as part of the story.

Tonton:
Defeat him during the story mode, the battle occurs as part of the story.

Yango:
Defeat him during the story mode, in the quests seen before facing the first main level.