Dragon Quest Monsters Joker 1 DS : Text files

[Wildcard42]

Hello everyone!

I'm looking for a tool to find the texts in the game and modify some of them (and maybe add some).

I already use HdX and Consoltools, but it's impossible to find the game's texts, even in hexadecimal form. I'm a beginner and a bit lost, I admit.
I'm doing all this on a European ROM (EN, FR, ES, IT, DE).

Thanks in advance if you have a solution!