You are using the wrong save type. In your emulator settings, change Flash Save Type to 128KB (not 64KB). Corrupted saves are common with 64KB.
Pokémon Solar Light Pokémon Lunar Dark are not GBA ROMs ; they are standalone PC fan games built using RPG Maker XP Pokémon Essentials engine. Because they are executive files ( pokemon solar light and lunar dark download gba rom
You need two things:
No, Pokémon Solar Light and Lunar Dark is . You are using the wrong save type