I love that the color of the Common Zentu is different depending on whether it is created in the day or night. I would love to see either a new potion or a new pet that actually changes color or rotates color while you own it. In other words, the pet could be one color during the day and the same pet a different color at night and back again the next morning.

This is a fun idea, but expensive to implement. Spectrum Blob switching up colors with each refresh comes instantly to mind. This is a lot of work for the artists and so it should be an expensive color like Angelic, or it should be a CSC doohickey that when attached to a pet will cause it to cycle between known colorfills.