Need help to create a custom event

Thank you for the fast reply! People on this site are very nice, your help is appreciated, hope to be able to the same for you one day.

ok so, this is what I understood
6b 84(map)00 Assign properties to
(character 00 40 21 40 40 00 00)
(create object 3d 00)
Assign graphics (37 00 00)
(Assign palette 43 00 00)
refresh45

(assign character to party 3f 00 01)
(remove 3f 00 00, 3f 0e 00, 3f 0f 00)

I've done this but when I enter the battle,
it freeze
I'm at CC9AE0, I try to change the narsh intro.
this is the original

and this is what I made