DPA009: Challenge! The Fortress Of Steel!!

Challenge! The Fortress Of Steel!! (挑戦! ハガネの城!!) is the 4th chapter of Volume 2 of the Pokémon Diamond and Pearl Adventure! manga.

Synopsis
Mitsumi and Jupiter are still battling against each other with their Pokémon. The battle gets interrupted by Jun and Professor Rowan, who are here to help Mitsumi. Saturn and Jupiter retreat quickly as they received orders from Cyrus to do so. Hareta and Piplup are meanwhile somewhere else and Byron wakes them up. After a quick meal, Byron leads Hareta and Piplup somewhere to test them.