Final README update

- Adds the Galarian Bird theme, crediting LuciShrimp.
- Removes the line mentioning Yellow Legacy's back sprites, as I decided against importing them in due to a bit of a style clash between them and the beta/custom sprites.

README.md

@@ -116,8 +116,9 @@ New Areas
 New Music
 ====
 - Mewtwo has its own battle theme: A demake of the iconic Stadium track! It features some creative deviations to give it a distinct Game Boy feel while fitting with Mewtwo's mystique. Composed by LuciShrimp.
-- Mew and the Legendary Birds have their own battle theme, a demake of the FireRed/LeafGreen pitch-shifted remix. Not simply pitching it up, percussion elements have been added to give it that rustic FRLG "feel" that distinguishes it from the original games. Composed by LuciShrimp.
+- Mew and the Kantonian Legendary Birds have their own battle theme, a demake of the FireRed/LeafGreen pitch-shifted remix. Not simply pitching it up, percussion elements have been added to give it that rustic FRLG "feel" that distinguishes it from the original games. Composed by LuciShrimp.
 	- Limited static encounters, such as the two sleeping Snorlax, and the restored prototype Omega, also use this theme.
+	- The Galarian Legendary Birds have a demake of their Sword and Shield battle theme instead! Composed by LuciShrimp. 
 - Mt. Moon Crater uses a demake of Scarlet and Violet's Area Zero theme! Composed by LuciShrimp.
 - Team Rocket's battle theme from GSC has been backported with some small changes to give it more of an RBY feel. Plays during Rocket Grunt fights, including Jessie and James, as well as the initial 2 Giovanni battles. Composed by LuciShrimp.
 	- In addition to the aforementioned Team Rocket battle theme, a slower, pitched-down arrangement plays when battling Giovanni in his gym, as well as against a postgame boss. Composed by LuciShrimp and Martha's Against Humanity.
@@ -387,7 +388,6 @@ If you use our implementations of anything at all, it is encouraged to submit Pu
 * Vortiene/Vortyne - Reused a bit of code from their pureRGB hack, including their Trainer AI, move animations and Pokedex stats page. Assisted in bug fixes. Used their sprite sheet generator.
 * wrulfy - Reused a bit of code from their Carmine Red hack to improve a handful of move animations, most notably Drill Peck and Horn Drill. Technical advice.
 * TheSmithPlays -  Reused a bit of code from their Yellow Legacy hack.
-* ZuperZACH, Isona, Karlos, Reader Dragon, and Alakadoof - Sprite artists creating the set of improved backsprites taken from Yellow Legacy.
 * Pigu-A, RevoSucks, walle303 - Contributors to Pokemon Anniversary Red's repository, where we reused the Green/FemC sprites and the Battle Tent.
 * Rangi - Reused a bit of code from their Red* / Blue* hack to make HMs usable in the overworld, and generally being an amazing individual.
 * BGVC - Composed the original 4-channel version of the unused Koukan (trading) music.