Quote from: RavenOfRazgriz on November 10, 2011, 11:40:42 am
Guests are based on, of all things, their Sprite ID. Place their Sprite over a character that Guests normally (one form of Agrias, Gafgarion, Mustadio, Rafa, Chapter 1 Delita, Algus, etc.), then set their ENTD Join up like said character. A unit not using those specific Guest-Sprite slots will NEVER Join As Guest without a specific ASM Hack Xifanie made, as far as I've tested.
As for making Characters Join silently - look at Gariland Military Academy's ENTD, when you get your starting 6 Generics. Miming what's done there should do what you need.
I'm not sure on either point there. I don't see anything special in the ENTD for the Gariland Academy for those characters, and I'm reasonably confident I managed to pull off getting a guest to join by doing just what RMD suggested. I didn't replace a slot normally used by a Join guest in the sprites, and I didn't write over a Join guest in any ENTD.
It may have been that I used a character who had the formation screen set up though (i.e. an overwritten Valmafra or something) so it's possible they don't join as guest unless they have a sprite slot in the Formation as well.