Last Saturday, while I was hanging around in a department store in Tokyo, I came across a unique shop, where many pieces of artwork from the British brand “Pets Rock” were on sale. Last Saturday, while I was hanging around in a department store in Tokyo, I came across a unique shop where many pieces of artwork from the British brand “Pets Rock” were on sale.

I was really impressed by its amazing characters with the images of animals (cats, dogs, and mice) resembling to superstars acrossund the world. I was really impressed by its amazing characters with images of animals (cats, dogs, and mice) resembling superstars around the world.

"AROUND the world" is more commonly used.

I was really impressed by its amazing characters with the images of animals (cats, dogs and mice) resembling tohe superstars across the world. I was really impressed by its amazing characters with the images of animals (cats, dogs and mice) resembling the superstars across the world.

For example, there was an American short hair cat wearing the costume of Audrey Hepburn from “Breakfast at Tiffany’s”, the Ca chihuahua dog representing Michael Jackson from “Thriller”, and so on. For example, there was an American shorthair cat wearing the costume of Audrey Hepburn from “Breakfast at Tiffany’s”, a chihuahua representing Michael Jackson from “Thriller”, and so on.

I would say "Audrey Hepburn's costume" to shorten the sentence. Dog breeds typically stand alone, so it isn't necessary to add the word "dog".

I impulsively bought a blanket, on which fifty lovely characters were printed. I impulsively bought a blanket, on which fifty lovely characters were printed.

I might use "on a whim", which has a positive, lighthearted connotation.

Among them, the hamster like Mr.resembling Donald/former president Trump and the Shiba dog likInu resembling the Dalai Lama awere especially easy to distinguish. Among them, the hamster resembling Donald/former president Trump and the Shiba Inu resembling the Dalai Lama were especially easy to distinguish.

When referring to appearance, "like" does not fit. Use "ressemble" or "look like" instead.

Among them, the hamster likethat resembles Mr. Trump and the Shiba dog likethat resembles Dalai Lama are especially easy to distinguish. Among them, the hamster that resembles Mr. Trump and the Shiba dog that resembles Dalai Lama are especially easy to distinguish.

Of course, I cannot guess all the original celebrities, becaus since I am not so familiar with movie stars and singers abroad. Of course, I cannot guess all the original celebrities since I am not so familiar with movie stars and singers abroad.

I think it would behave been better if the names of the characters would havehad been written beneath of them. I think it would have been better if the names of the characters had been written beneath them.

Conditional perfect + past perfect

I think it would behave been better if the names of the characters would have beenere written beneath of them. I think it would have been better if the names of the characters were written beneath of them.