Three garrulous alien critters – Sonic, Tails and Knuckles – each with their own distinct skill set and fur colour so lurid that it scorches your optic nerves, are summoned to protect humanity from an evil space hedgehog named Shadow (voiced by Keanu Reeves). Shadow has rage issues, super speed and a gloomy emo-black colour palette. But in this frenetically empty sequel, cluttered with pinballing animated extraterrestrial varmints, the most cartoonish performance comes from a member of the human cast: Jim Carrey reprises his role as the villainous inventor Doctor Robotnik, and takes on a new character, Robotnik’s demented grandfather Gerald.

While I had more time than many of my fellow critics for the two previous movie spin-offs from the Sega video game series, it turns out that you can, in fact, have too much of a good thing. Two Jim Carreys, each of them turning every individual line of dialogue into an extravagant pantomime of gurning and grandstanding, is categorically one too many.

• In UK and Irish cinemas