7 books in series

Pokémon Adventures: Ruby & Sapphire Chapter

Pokémon Adventures: Ruby & Sapphire Chapter is a 7-book series with 7 primary works first released in 2003 with contributions by Hidenori Kusaka.

Pokémon Adventures: Ruby & Sapphire, Vol. 15
Pokemon Adventures: Ruby & Sapphire, Vol. 16
Pokémon Adventures: Ruby & Sapphire, Vol. 17
Pokémon Adventures: Ruby & Sapphire, Vol. 18
Pokémon Adventures: Ruby & Sapphire, Vol. 19
Pokémon Adventures: Ruby & Sapphire, Vol. 20
Pokémon Adventures: Ruby & Sapphire, Vol. 21