Here is a link to a page that showsa the original intes, otachie, paor, easero, and the current sirleon.
This is an older ebbie, I'm guessing the original.
Here is the aukira, zaphao, skaldyr, and malal.
Here is tesuri, meiko, zennie, and sirleon, although there is only one stage
The other two stages of Meiko can be found Here and Here
The other two stages of sirleon can be found Here and Here (in sepia)
The full Tesuri set can be found by going Here, Here, and Here.
The old Baby and Adult Gondras can be found Here and Here respectively
Here are two stages of the old iluvu
Here, Here, and Here are the old Chimbys
Here, Here, and Here are the stages of one of the iluvu revamps
Here is what Tommy (the toy shopkeeper) used to look like
Here shows an old layout with the baby drindian and ahea
I think this was most probably the teen ahea
Old mira is shown in greyscale at the top of this
From what I'm reading, this, this, and this (on the far left) were apparently creatu that were never released
This appears to be an adult albino ahea
These were all I could find so far through google and old threads, I'll let you know if I find anything else.