It doesn't differ a lot from the original version.
I'll be changing:
Difficulty of Trainers - Easier (Somehow)
Music - You will not hear the same music track over and over again.
Thanks to SBP, the music now matches every area.
Also, Leaders, Elite Four and Champion will NOT have normal Trainer music.
Instead, they will have suitable music.
Eg. Leaders will have Leader music, Elite Four will have Elite Four music and
Champion will have Champion music.
New PKMN are added. (Gallade, Glaceon, Leafeon, Mamoswine and Rhyperior)
Sadly, GBA Roms can only hold 5 evolution data, so Glaceon and Leafeon can't be evolved with Eevee. Instead, they can be caught in the wild.
Rhydon and Piloswine will evolve into Rhyperior and Mamoswine respectively
when they reach Lv. 55.
Kirlia will be evolve into Gallade when its Attack is higher than its Defense.
New cries are added. Now, almost every Gen 4 and 5 PKMN will have their suitable cries! (Except for the Gen 4 and 5 PKMN in the free 25 slots)
No more Japanese Gen 5 PKMN names! They will all have their English names.
Pokédex Entries are edited! In the original LP, Wesley is too lazy to edit Gen 5
PKMN entries. Well, in the English version, ALL of the Gen 5 PKMN (Except for Gen 5 PKMN in the 25 free slots) will have their corresponding entries inserted!
Name changes will be made to important people and Gym Leaders.
Also, every Trainer will have their own name. Those names
are custom made, and they will not be reused.
Jessica ---> Ariadna
Name origin: Comes from the Biology term, Arachnid.
Lucas ---> Lakie
Name origin: Comes from "lake".
Thomas ---> Auric
Name origin: Comes from "aura".
Terra ----> Mitsis ("Mitz" as the abbreviation)
Name origin: "Land" for Georgian.
Marina ---> Vatten ("Vatt" as the abbreviation)
Name origin: "Water" for Swedish.
Shirley ---> Shirl
Reason for name change: All admins in Team Steam
have custom names (Sheyla, Katyne). Well, Shirley is obviously
NOT a custom name, so I'm going to name her "Shirl" instead.
Rayner ---> Voltige
Name origin: Comes from "volt".
Decapitalization of every single name.
You name it. Towns, people names, PKMN have their names decapitalized.
That's pretty much I'm going to edit LP.