The GBA version comes with the following instruction booklet, depending on region:

• NA box version (US English): manual_NA_goodboygalaxy_small.pdf
• EU box version (UK English): manual_EU_goodboygalaxy_small.pdf
• JP box version (日本語): manual_JP_goodboygalaxy_small.pdf

These are cut down and reduced DPI versions, main contents are repeated below:

• Basic Controls
• Equipment: Blaster
• Equipment: Jet Pack
• Equipment: Shield
• Your ship
• pawsOS
• Beasties Large and Small
• Acquired Knowledge
• The Story So Far...