Pokemon gameboy lot vintage(read description) Consoles

This lot comes with
-Pokemon gameboy color(has some wear to the start button but works… and is missing battery cover) works good though
-pokemon crystal version (works fine but, doesn’t save. I think it just needs the battery changed in the cartridge)
-pokemon silver version
-pokemon red version (stops working at the gameboy screen) not sure how to fix gameboy games 🙁
-brain boy
-uno
-avenging spirit
-tetris
-killer instinct
-vintage pikachu gameboy case