Sphinx and the Cursed Mummy Cheats (GameCube)

After beginning a new game just get the sword on the 1st level to 
  unlock the making of Sphinx Movie


      How to get past the 1 
      st level.

      After the movie Honrax (the eagle) runs off to the peak (next to 
      the lava flow)he'll say something and a monster will appear the 
      monster will ask you to get him some coconuts from the trees .The 
      first &  second one will be next to you(use the rocks to throw at 
      the trees, and the rocks are near too.) The third one is by the 
      lava flow, (rocks there too). 

      Then go back to the monster and give him the coconuts, then he'll 
      put you in his mouth and you will get to aim yourself to where the 
      passage to walk on lava and meet Honrax (the eagle). After you get

      that drop down and go across were the rocks are take a right after 
      a little while,  you'll find a statue pull it backwards then the 
      lava will flow in to the geeser orn lava pit.Go to the monster 
      again aim to were you went to get lava walk get it go to the 
      geeser jump up on it it will shoot you up then you will find two 
      more, jump on them, then there will be a eye that won't let you in 
      the other part. Go to the right and there will be a ledge jump 
      off, if right Sphinx will automatically grab on. Wait a little 
      while the eye will start looking for you wait a little bit and 
      jump up when he is not looking.        

      
  

In Abydos there is a bum near the memory games.  When you talk to him he 
asks for money, if you can afford it give him 10, do it 3 or 4 times and 
you get a piece of ankh.

Once you get capture beetles and have destroyed the eye of Rah posts in 
Heliopolis near the Cursed Palace capture a fire armadillo.  Then go in 
front of the Cursed Palace and use the great eagle pad and then climb up 
the rope.  There will be a boulder on a wooden platform.  Use the 
armadillo on that and then go where the boulder smashed.

Im not entirely sure what this gives but out side of the Cursed Palace 
there are targets on islands, once you have blowdarts stand in the 
middle island and shoot them all, a chest will appear and you get a 
reward (pretty sure its an Ankh Piece)



A Secret Place in the Palace

In the second level, when you're king Tut in his palace, there is a hole 
inside which you can go through.  Exit Tut's bedroom and look around 
different rooms until you find a room with a long table in it.( dining 
room) First, have some fun. Jump on the table to crash plates, vases, 
and cups.  Now, back to business.  Go to the end of the room where your 
throne is located.  Walk over to the side of it and grab on. Pull or 
push it as far as it will go and a hole will be reveled.  Although your 
father tells you not to, go through the hole and explore!  An old amulet 
is down here!

Every time you play as the Mummy, you will see pyramidal boxes with a 
  glowing center.  Set yourself on fire and run up to these boxes.  They 
  will burn and the Onyx Scarabs will be set free.  Catch them all, they 
  become useful later on.

  At the Bedouin Outpost there is a vender who sells a variety of useful 
  items, but the catch is he only will accept Onyx Scarabs.

Along your guest you will find a large amount of Gold Ankh Pieces.  You 
get the regular story: 'Collect four of these and someone with the right 
skills will put them together into a Gold Ankh which will increase your 
health by one'

But where is this person?

At the Bendouin Outpost there is one large tent with a dog-woman in it.  
It looks like she's hitting her hand with a stick.  Talk to her and, for 
a price, she will convert your four Gold Ankh Pieces into one Gold Ankh.