According to Revenge of the Fans, Rob Delaney (‘Deadpool 2’) is on the official cast list for ‘Pokémon Detective Pikachu.’
Reportedly, Delaney has been part of the cast since the project was still operating under the code name “Gumshoe.” Moreover, he is one of the only names not yet revealed. This secrecy implies something important for his character.
However, it is unknown what kind of role Delaney has in the film, be it Pokemon or human. Either way, we’ll just have to wait and see!
Source: Revenge of the Fans