Where can I find which achromatic pets are in season? I scrolled through the updates and didn't see any information, and my first-ever Kir quest is for an achromatic Chimby.
For Chimby, you have a chance to hatch an Achromatic with each hatch. Cash-Shop creatu are only hatchable in Achro during specific months. Chimby are "findable" eggs so that does not apply to them.
Its a part of the Summer Luau event, so right now it won't function. Once the Luau comes around again, it will work! You can dive for certain things if you have the required dive gear. But again, its not active right now. Hope this helps!