I think “Detective Pikachu” did a really good job with the world. When I watched it, I felt like I was actually inside the Pokémon setting, not just watching actors in costumes. The Pokémon looked believable, and their behavior matched what I know from the games. “Sonic the Hedgehog” surprised me more. At first, I did not like the design they showed, but after they fixed it, the movie became more enjoyable. It felt simple but honest to the character.
For me, a good adaptation needs to respect how the characters act. If they change too much, it breaks the connection. Story can be new, that is fine, but the personality and tone should stay close. I also think pacing matters. Some movies try to put too many references and forget to tell a clear story. I prefer when they balance both.