- To get a Pokemon egg, you either drop off two compatible Pokemon at the Daycare Center on Four Island (and then walk around for a while and hope there's an egg waiting for you when you get back) ... or pick up a free Togepi Egg from the guy in the Water Labyrinth off Five Island (to get the Togepi egg, though, your lead Pokemon needs to be at maximum happiness.)
- To get into Dotted Hole, use Cut on the door. Go through the maze to the very bottom, where you will consequently have the Sapphire stolen from you but also gain a password for the Team Rocket warehouse, which leads to ...
- To complete the Five Isle Meadow / Team Rocket warehouse section, you need to do the Dotted Hole part first. With both passwords, you can get into the warehouse. Find your way back to the scientist who stole the Sapphire from you, fight him, and you get the Sapphire.
- And to get into Cerulean Cave, just get the National Dex and fix Celio's machine for him by bringing him both the Ruby and the Sapphire. Once the machine is fixed the guy in front of Cerulean Cave will disappear.