If I recall correctly, みてえ for みたい (and similar changes) is a particular kind of Japanese dialect. If a fictional character in a book, who was obviously not supposed to actually be Japanese, was made to speak like みてえ, then what kind of effect would the author be intending to create?
I hope this hasn't been answered before in a previous question of mine. If it has, apologies.
I hope this hasn't been answered before in a previous question of mine. If it has, apologies.