Here's what changed:

The seasonal eggs are now out for about 2 weeks but you can only hunt them for 48 hours. You have the option to start the hunt whenever you want within that time period. Then the clock starts ticking and does not stop even if you go offline so always make sure you pick two days when you have a lot of free time. When the clock stops your hunt is over and you will not have another chance to find the eggs until next year. ;3

The new seasonal creatu have all been obtainable by exchanging old seasonal creatu and eggs for the new seasonal egg.

Narwi = Exchange Uilus

Vaspi = Exchange Iluvu

Kurrabi = Exchange Easero

You can only make the exchange around the time that the seasonal hunt is open.

No, the ratio is 2:1. :3

Actually what happens is you hand in creatu or/and eggs for points which you use to purchase the new seasonal eggs. It's usually the new seasonal egg costs 200 points and an old seasonal egg is worth 100 points. The different coloured creatu are worth different amounts of points depending on how rare they are. Naturally, albino is worth the most points. I think you got 1000 points for handing in an albino seasonal. p; Dyed pets count as naturals and are only worth 10-20 points.

We're talking about seasonal hunts. The seasonal creatu are Iluvu, Easero, Uilus, Ebilia, Jaaku, Vaspi, Narwi, Kurrabi. The eggs of these creatu become findable (or obtainable through egg/creatu exchanges) around the time of their respective holiday.

Example: Iluvu eggs become findable for 2 weeks around Valentine's Day. Around the same time you may exchange Iluvu eggs and creatu for Kurrabi eggs.