What pet would you want

[W!†A_cRaft]

rat

or a classic, dog

though i would prefer a pig

 

[Sunchips]

You could do one like Blalanar in dota. (stronger at night) That's both a strenght and a weakness

 

[jackall]

you could make tigers, possesed animals, an evil smiley, demons, orcs and the list goes on... living plants(i hate flowers), man's best friend( the internet :thup
EDIT: cyclopes, weasels, shaur(a kind of satyr), centaurs, gnolls, yeti(only 1 in whole game)
EDIT2: i almost forgot... how about a Renendaru pet?

 

[BANANAMAN]

I want...a pet Black Dragon or lava elementals

 

[canons200]

so you want the pet have strengtness and weakness?
the thing like help attack, off effect i will just skip as you would add it if you want
bat = bite (attack) enemy and turn enemy to your unit, of course low hit point
chicken = drop gold coin every few second
dog = frighten/theaten your enemy, decrease their armor or damage
hawk = invisible unit, gain more vision, help to scout
dragon = mount ability and mount your unit to ride on it, gain flying ability