I don't know the levels, but for the first GBA Fire Emblem they are: Eliwood Hector Lyn/Lyndis Kent Sain Florina Wil Dorcas Serra Erk Rath Matthew Nils Lucius Wallace Marcus Lowen Rebecca Bartre Oswin Guy Merlinus Priscilla Raven Canas Dart Fiora Legault Ninian Isadora Heath Hawkeye Farina Geitz Pent Louise Harken Karel Karla Nino Jaffar Vaida Renault Athos

Again, i am not sure what level(i'll put it if i can). This is for the Sacred Stones. Erika(prelude) Seth(Prelude) Franz(chapter 1) Gilliam(chapter 1) Vanessa(Chapter 2) Maulder(Chapter 2) Ross(Chapter 2) Garcia(Chapter 2) Colm(Chapter 3) Neimi(Chapter 3) Artur(Chapter 4) Lute(Chapter 4) Natasha(Chapter 5) Joshua(Chapter 5) There is a chapter following a different path 5x Erika's path Ephraim's path Tana(Chapter 9) Tana(Chapter 9) Amelia(Chapter 9) 1 Amelia(Chapter 9) Innes(Chapter 10) Duessel(Chapter 10) Gerik(Chapter 10) Cormag(Chapter 10) Tethys(Chapter 10) L'arachel(Chapter 11) Marisa(Chapter 10) Dozla(Chapter 11) L'arachel(Chapter 11) Ewan(Chapter 12) Dozla(Chapter 11) Marisa(Chapter 12) Saleh(Chapter 12) Gerik(Chapter 13) Ewan(Chapter 12) Tethys(Chapter 13) Alemia(Chapter 13) last time Rennec(Chapter 14 Cormag(Chapter 13) Erika(Chapter 15) Rennec(chapter 14) Saleh(Chapter 15) Ephraim(Chapter 15) Innes(Chapter 15) Duessel(Chapter 15) Knoll(Chapter 15) Knoll(Chapter 15) Myrrh(Chapter 16) Myrrh(Chapter 16) The Twins Reunited Syrene(Chapter 17) Bonus Characators Caellach Fado Glen Hayden Ismaire Lyon Orson Selena Valter