Pokemon Crystal Questions

First I want to thank Darkboarder and everyone else that helped me last time!! Now of course I have more questions-
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<BR>#1- I know that the Unknowns are in the ruins of Alph, but where?
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<BR>And do you have to go on the weekends or something when channel 13.5 is on?
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<BR>I haven't got a chance to go on the weekend yet, but just to make sure I'm asking if you like find them where they leave those weird messages? So please help me if you can!!!
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<BR>#2- I'm still looking for Entei and Raikou of course so please leave where you found them the FIRST time.
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<BR>#3- And I'm also wondering if it's possible to find the three legendary birds? On crystal? If not it's cool. Thanks everyone for your answers!
<BR>SuperCheats rocks!

Date of Question: Apr 18th 2004 | Question ID: 1748

Take me seriously now: You can't find the Unowns in that place until you complete one of the stone panel puzzles in the four caves.

If you complete it, you will drop down through the hole and end up in the main chamber. The people will be gone, but the Unowns are now about.

And another thing: If you capture three kinds of Unown, a researcher will speak to you on your way out and escort you to the laboratory, where he will upgrade your Pokédex to include "Unown Mode." Press SELECT in the Pokédex to enter the Sort Menu, and you will find a new option called "Unown Mode." This option allows you to track the kinds of Unown that you have captured in the order that you captured them in. If you capture all 26 variants, the printer in the laboratory will become available for your use: You can print out stickers of your favorite Unown.

There's also something that I need to tell you about the weird inscriptions on the walls of the puzzle chambers:
ESCAPE: Use an Escape Rope to exit the chamber, and then walk back in.
LIGHT: Use Flash in the chamber.
WATER: Attach a Water Stone to your front Pokémon before you walk in.
HO-OH: Shunt Ho-oh to the front of the party before you walk in.
If you fulfill these requirements, a hole will open up where those inscriptions were. There are four items in each new chamber, including Heal Powder and Revival Herb. Go through the hole to read a message spelled out using the Unown. The last hole will take you to the main chamber.

I can see someone else has already answers your question but they forgot to tell you that you can't catch the Legendary Birds.

Hate to break it to you, but you gotta go to the trouble of trading them across.