Successfully collect all Pokemon in either Pokemon Ruby or Pokemon Sapphire to unlock an alternate border in adventure mode.
Store 1 Pokemon to get Swablu with the False Swipe Egg.
Store 60 Pokemon to get Zigzagoon with the Extreme Speed Egg.
Store 500 Pokemon to get Skitty with the Pay Day Egg.
Store 1499 Pokemon to get Pichu with the Surf Egg.