![Image](http://images.neopets.com/images/nf/wocky_biscuit_happy.png)
Yes, there was only one colour given to the poor Wockies on their special day. I suspect Mutant was supposed to have also been released but it never was. I also seem to recall a flub in the Caption Contest where there was a Woodland Wocky.
This leaves:
Checkered
![Image](http://images.neopets.com/images/nf/wocky_checkered_happy.png)
Chocolate
![Image](http://images.neopets.com/images/nf/wocky_chocolate_happy.png)
Custard
![Image](http://images.neopets.com/images/nf/wocky_custard_happy.png)
Maractite
![Image](http://images.neopets.com/images/nf/wocky_maractite_happy.png)
Maraquan
![Image](http://images.neopets.com/images/nf/wocky_maraquan_happy.png)
Mutant
![Image](http://images.neopets.com/images/nf/wocky_mutant_happy.png)
Relic
![Image](http://images.neopets.com/images/nf/wocky_relic_happy.png)
Snot
![Image](http://images.neopets.com/images/nf/wocky_snot_happy.png)
Speckled
![Image](http://images.neopets.com/images/nf/wocky_split_happy.png)
Split
![Image](http://images.neopets.com/images/nf/wocky_split_happy.png)
Sponge
![Image](http://images.neopets.com/images/nf/wocky_sponge_happy.png)
Strawberry
![Image](http://images.neopets.com/images/nf/wocky_strawberry_happy.png)
Transparent
![Image](http://images.neopets.com/images/nf/wocky_transparent_happy.png)
Tyrannian
![Image](http://images.neopets.com/images/nf/wocky_tyrannian_happy.png)
Woodland
![Image](http://images.neopets.com/images/nf/wocky_woodland_happy.png)
Zombie
![Image](http://images.neopets.com/images/nf/wocky_zombie_happy.png)
There are many potentially good colours here: Zombie, Woodland, Tyrannian, Transparent, Mutant, Maraquan, Maractite, Chocolate, and even Speckled (if given due care). Strawberry might also have potential too, though it depends on how it's done. Checkered and Split tend to be unimpressive by and large while Sponge has lost a lot of its luster since the revamp. Relic hasn't been done in a while, so it might be a contender. Custard and Snot are Custard and Snot.
Thoughts, hopes, desires?