You'll probably start your real game with a normal egg as they are the cheapest. These are regular-looking white eggs which are easier to care for than the others. This is what the game has to say about the egg when you adopt it:
"Don't let the name fool you, these guys are energetic, hatch in only 3 days, and are pretty hard to kill. They're basically super eggs."
This much is true about them. These eggs cost 5,000 coins, hatch in 3 days and their difficulty level is 1/2 out of 4 "eggshells".
Normal Egg Creatures
Neutral- Turns into a Pupsley. This is a maroon and paisley corgi dog. It will give you 10 coins every 2 hours 27 minutes. Here is its in-game discription: "This plane dog is anything but plain. The happy, well-rounded Pupsley is loyal, adventurous and aerodynamic."
Nerdy- turns into a Chekibell. This is a olive green and white checkered cow that gives you 8 coins every 1 hour 58 minutes. Bio: "Chekibells are shy around strangers, but have a wide range of intrests. They're known to spend hours on end arranging their collections of dirt clods shaped like presidents and novelty twigs."
Pretty-turns into a Polkalette. This is a red, beige dotted and pink headed(clawed,and edge-of-wings trimmed) hen. It will give you 12 coins every 4 hours and 16 minutes. "The lovely Polkalette is particulary proud of its pretty plumage. It enjoys picnics,pageants and pretentious poetry. Keep it away from mirrors and still puddles if you ever want to get its attention again."
Cute- Turns into a Ginglamb. This is an orange lamb wearing a colorful checkered hoodie-overall cloth. It will give you 6 coins every 1 hour 28 minutes. Here is the bio: "The colorful Ginglamb is very friendly and loves to organize pretend tea parties with other creatures. It can often be found crafting party invitations out of twigs, leaves, and dewdrops."
Athletic- Turns into a Zippig. This is a black pig with a gold zip going from under the neck through the belly and up to the tail. It will Give you 10 coins every 2 hours and 27 minutes. Bio: "Zippigs are competitive by nature, and will try to turn almost any activity into a game. They are often found rolling around in piles of trophies and bathing in the tears of their vanquished rivals."
Dark- turns into a Stitch Weasel. This is a black, slinky, sewn up weasel. It will give you 14 coins every 3 hours 26 minutes. Here is the bio: "Shifty and skittish by nature, the Stitch Weasel will only be comfortable around people and creatures it knows and trusts. They are often found peeking around corners and then running away."