By four-wheeled object, do you mean a car of a sort? In that case, I have no clue.
However, I will make a question.
I am a Dark-type Pokemon.
I can be anything or anyone. I can be your friend or enemy.
By the time you realize you've been deceived, I may have already fled.
The only way you can tell me apart from the true being is by my tail.
What Pokemon am I?
This is the final evolution of a starter Pokémon;
It's the starter Pokémon that evolves into its final form at the earliest level;
His name is missing a vowel due to a 10 character name limit when he was first created.