Adding new itens to map and trainesr classes+names

[Sliter]

Hello everyone! I'm translating pokemon platinum to my language (portuguese) and I in doubt abot this

For the charcater names I find some on the text file I got with TheNewPokeText (Pl_msg.narc) and I think isn't all there, Like for Cynthia and Cyrus to show in battle as example, the sabe with some trainer classes, I found a few but not all of them are there, maybe trhey are on another file, not on the Pl_msg.narc?(And about the msg.narc that are text from D/P, the platinum make any use of this file or is just a leftover?)

an d for the itens is a idea for an extra on the translation, but could be usefull for someone that wnat to play the platinum nowadays: I want to hide some of the event key itens, for the darkrai event, shaymin event and and stufs, as example, I want to hide the Oak's letter on a corner in the Rowan's laboratory, if the player go and press A, will find the item there, as example

well anyone could help me please?