At a pet store!
Syrian hamsters are the most common breed, you can usually find them in pet shops or with breeders.
wet tail is the most common.
the most common place to find penguins is in Antarctica
japan
On a doorknob
It depends what breed of hamster. Most just find a place to settle and stay and others like to move around to live and make a house.
parsly (celery)
a forest or the woods
In the ocean.
Africa
Underground
There is no most common place to find Suicune (sometimes misspelled as suicun) in Pokémon FireRed. Where it goes is totally random.