I can accept nothing but victory, because I have already pledged the honor of my family name in front of an audience!
–-Platinum in Pokémon Adventures: Volume 31
Platinum Berlitz (also known as Platina) is a Pokédex Holder in the Pokémon Adventures manga. At the beginning, Diamond and Pearl thought she was their tour guide, with Diamond taking an early interest in her and Pearl getting a little annoyed and perplexed regarding her attitude.
Prior to starting her Pokemon journey, Platinum was born into the Berlitz family, well known for their wealth and generations of scholars. Due to this fame, she became well acquainted with Professor Rowan. This led to her possession of the Pokédex and the three Sinnoh starters, which she was meant to provide her bodyguards. The original purpose of her Pokemon journey was to continue the Berlitz family tradition, by traveling to Mt. Coronet and obtaining a specific material used in creating the Berlitz crest.
She didn't know that Diamond and Pearl were her bodyguards and she thought about it when she learned the truth but she still kept the two of them because of their friendship. She is being taught by Diamond and Pearl how to battle.
Whenever she is battling a Gym Leader, Diamond and Pearl give her some tips. She met Cynthia while training for her battle with Gardenia. In later chapters, she swears to defeat Team Galactic's plans and forgives Diamond and Pearl for lying.
Empoleon was a Pokémon chosen by Platinum when it was a Piplup. It evolved into a Prinplup along with Tru and Chimler. It has been used in various battles and contests. It later evolved in the Veilstone Department Store during Great Gible.
Maylene gave her Pachirisu to Platinum when Candice have her Frosslass and Gardenia her Cherrim. Maylene later mentioned that Pachirisu didn't belong to her but to Volkner and he asked Maylene to give Pachirisu to Platinum.
Platinum lent Chimler, when it was still a Monferno, from Pearl to use it in her battle against Maylene. Maylene saw Platinun using Monferno and Chatot, not knowing they weren't from her, and asked her to use those two Pokémon in Platinum's battle against her.
Platinum lent Chatler from Pearl to use it in her battle against Maylene. Maylene saw Platinun using Monferno and Chatot, not knowing they weren't from her, and asked her to use those two Pokémon in Platinum's battle against her.
Grumpy and Flaky are two Unown that Platinum befriended in Knowledge of the Unown I at the Solaceon Ruins. She nicknamed according to the characteristics and because they reminded her of Diamond and Pearl. She later helped them along with Dia and Pearl to release their friends.