While fans were a little nervous about Ryan Reynolds taking on the role of Detective Pikachu, now it's hard to imagine anyone else. At one point in time, even Mr. Reynolds wasn't sure about getting involved. In an interview with io9, Reynolds talks about not taking on the role right away.
“When they approached me to do it, I didn’t say ‘yes’ right away, even though I was really excited about the story. It really resonated with me. My first question was, ‘Who is supposed to play this?’ Is there someone I am taking a job from? Specifically, am I in territory where I shouldn’t be in? It turns out it all got the greenlight from everyone I trust and love and off we went. So yeah, there was some trepidation. It wasn’t like me wondering if I could pull this off. It wasn’t that. I felt pretty confident about my take on it.”