Complex sentence: Kebbell said that he concentrated the most on the voice of the character, adding, on the animated series, they never got his voice what I imagined it to be when I read the comics as a little boy.
Split into simpler sentences: Kebbell said that while playing the role, he concentrated the most on the voice of the character. He added, on the animated series, they never got his voice what I imagined it to be when I read the comics as a little boy.