Follow the snake into the east end of the mall, to MacGuffin's, then to Sizzle, and finally back to the atrium at the Chinese food stand. Use the robot bird, but he swallows it and runs off.
No one knows, and you do not have to find him. Eddie will come back to help out in the end.
The favorite snack of Eddie the snake (as mentioned by his owner) is birds. But you can get a robot bird from Giuseppe's Toys. You still have to catch up to the snake to feed it to him.
You get a robot bird from Giuseppe's Toys. After you chase Eddie to MacGuffin's, then Sizzle, then the Chinese Food stand, you feed him the snake. But he just slithers off.
The snake likes to snack on birds. But you can get a robot bird from Giuseppe's Toys. You still have to catch up to the snake to feed it to him.
You first run into the masked robber (complete with moneybag?) when you have fed Eddie the snake and go to check on a security outage at Carnival Costumes. You surprise him at MacGuffin's and get the key to the back room at Good Deals.
There is no mouse. The snake's favorite snack is birds. Fortunately, you can get a robot bird from Giuseppe's Toys.
You are checking on Eddie the snake. He has gotten out of his tank and into the mall. Chase him left across the atrium to the other wing of the mall. He will be at MacGuffin's, then at Sizzle, then back in the food court at the Chinese Food stand.
You have to chase the crook through the vents and escalator machinery, cutting through the blocking grates with the blowtorch. When you catch him, you both plummet into the atrium fountain, where he is kayoed by Eddie the snake. For the full solution, see the related question below.
You only have the scooter when you are chasing the security cart around the mall. You use the password (frost) to get it from the Manager's Office, and charge it with the charger device from MacGuffin's. After you chase down the cart, Eddie the snake has the scooter (and may still have it when you leave).
Continue on to the left side of the mall. Gus will suggest you take another look for clues at PrintFax.
When you leave the atrium, an alarm comes in from Carnival Costumes, and then the camera goes off, like the one did before. Go there to investigate.