I have the following questions: 1: How do you get to Four Five and Six..

To get 4,5,6 islands you need to beat the elite 4,and to get in the cave you have to complete all the stuff on4,5,6,and beat the elite 4,

1. When you give the Ruby to Celio he will give you the Rainbow Pass which will allow you to go to islands 4, 5, 6 and 7.
2. After you beat the Pokemon league and get the National pokedex you will be allowed into the Cerulean cave.

1. To get to these Islands you must get the ruby from Mt. Ember and give it to Celio. To get the Ruby go to where there are two rockets standing and approach them.

You will have to fight them once they flee enter the cave and follow the trail before you do so make sure you have a Pokemon with strength. Once you come to an intersection take the left path and push the boulder.

Go into the opening and retrieve the ruby. Go up the stairs surf or fly to One Island and give the gem to Celio. He will then give you the Rainbow pass and you can now explore four, five,six and seven Island.
2. To get into cerulean cave first complete the network machine by giving Celio the Ruby and the Sapphire.

To get the Sapphire go to Four Island, go into Icefall Cave get the HM Waterfall teach it to a Pokemon and go up the waterfall in the entrance. Meet up with Loreli and help her beat the Rockets. Go out and take the boat to Six Island head to the Dotted Hole and use cut in front of the door. Go in fall through the hole.

Take the uper hole, then the left hole, then the right hole, and finally take the bottom hole. Get the Sapphire, then let it get stolen from you. Take the ladder up and go out the cave. Take the boat back to five island go to the medow and enter the two passwords to gain access to the rocket warehouse.

Find a way to reach Gideon (the scientist that stole the Sapphire) and get it from him (you will have to fight him) then once you have it take the boat to One Island and give the Sapphire to Celio.

Once he is done talking take the boat to Vermilion go to Cerulean city and then enter the Cave. There it is, Unknown dungeon the place to catch Mewtwo.

1.you have to do all the quests on island 1,2,3
2.you have to get the ruby and sapphire stone on the sevii islands

1. Continue through the game until you get the tickets from Celio an' from some other guy.
2. Beat the Elite 4 the second time (when they get mucho stronger) an' all the Islands.

-SGX

1) Give Celio the Sapphire.
2) Beat the Pokemon league and get the ruby and sapphire

1. You must obtain the Ruby gem from Mt. Ember and give it to Celio. He will give you the Rainbow Pass which enables you to access Islands Four, Five, Six and Seven.

2. Beat Team Rocket from Icefall Cave on Four Island, then beat them out of the Warehouse on Five Island and beat the scientist to get the Sapphire gem he took from you back. Give the Sapphire gem to Celio and you can enter Cerulean Cave.

1.Give Celio the Sapphire when you find it

2.Beat the elite four