Thanks. maybe I can try to mod the french version myself to add what I want to have (all pokemon available and the evolution changes).
Can you advice me a tool to change the wild pokemon, put legendary pokemon and change the evolution system in heartgold ? Is it possible to do by a noob like me ? I don't want to change anything else.
EDIT : never mind. Some tools doesn't work with the french version. Sorry to bother you
EDIT2 : I still what to try to put the language in it. I read about a .narc who have the french translation. How can I take the .narc in the french version and put it in sacred ?

(if the new added text is still in english it doesn't matter)