Sonic the Hedgehog 2” earned an excellent $71 million opening this weekend from 4,232 theaters, topping the $58 million launch of the first “Sonic” film in 2020 and setting opening records for video game adaptations and for lead star Jim Carrey. At a time when theaters have been looking for movies that can bring families back into the seats, “Sonic 2” delivered with parents and kids making up 58% of the opening weekend crowd — up from 49% for the first “Sonic” — with 67% under the age of 25.