The following is a list of familiars in Aground.
Image Name How to Obtain Sell Cost Damage Feed Weight Notes
Chicken Trapping Fire Chickens or buying from market 70 100 N/A 800 2 Lays eggs
Rat Trapping 28 40 N/A N/A 1 Picks up items on the ground
Wyrm Trapping 210 300 2 1000 4  Mining speed +1
Mecha Wyrm Making it at the Mirrows operation table 1 Wyrm

1 Silicon

2 Uranium

9 Steel Bar

6 4000 8

Mining speed +1

Produces 1 Uranium when in a cage.

Cocoon Feeding Wyrms in the Wyrm Pen N/A N/A N/A 4 Hatches into baby dragon in wyrm pen, can use an alter gem to instantly hatch
Baby Dragon Hatch From Cocoon 280 N/A 3 2000 4 Breathes fire

Produces 1 Dragonblood when in a pen.

Juvenile Dragon Raise from baby dragon 420 3 4000 20 Breathes fire

Range: 7

Adult Dragon Complete quest or raise from baby dragon 4 8000 60

Breathes fire, wears out quickly

Range: 13

Tame Wolf Complete quest

or by Trapping a wild Diode Wolf

70 3 2000 2 Attacks enemies. Can be upgraded into Diode Wolf
Peri (Cat) Complete Fisherman's quest at Sunset Haven/Trapping a Shadow Cat 70 2 2000 2 Expands sight by 2 tiles

Can move vertically

Lights surroundings

Cockatiel shady man at night (sunset haven) N/A Picks up items on the ground
Diode Wolf Found in one of the Ship's Caves on Sunset Island/ Making it at the Mirrows operation table 4 500 5 Feeds by consuming electricity from the Player's batteries. Produces 1-3 Sulfur when in a cage.
Golem Craft at Golem Factory 4 8000 20 Must defeat the Golemmech inside the cave to craft. Gives 1 Iron ore and 2-4 Coal when in cage.
Electric Eel Fish inside the cave with the lake on Sunset Haven

There is also a chest in the lake between the starting and magic island that has an electric eel(Note: You won't get the achievement)

- - 2 Lights surroundings when equipped underwater Gives +2/sec energy when not in vehicle.
Owl Shady man at night (sunset haven) 3 Occasionally swoops and attacks
Panther Trapping a Shadow Cat with Enchanted Trap 4 4000 2 Reveals Spirits without needing Spirit Goggle
Crawler Trapping 7 2000 2 Gives +4 stamina/sec in daylight
Shark Trapping 14 2000 6
Black Cat Transforming a cat with a Shadow Fur 2 2000 2 Spellcasting +1

Reveals Spirits