Mallu Singh delivers a commercial entertainer with a mix of action, comedy, and family drama. The story is straightforward and relies heavily on the trope of mistaken identity, which is executed with a fair amount of humor and energy. The screenplay maintains a decent pace, especially in the first half, which is engaging with its blend of light-hearted moments and character introductions.

The second half leans more into action and emotional drama, though it tends to be predictable and somewhat formulaic. The film's pacing slows down at times due to extended fight sequences and melodramatic scenes, which might test the patience of viewers looking for a tighter narrative. The songs and background score complement the mood of the film, with catchy tunes and energetic BGM enhancing the action and comedic scenes, though none of the tracks stand out as particularly memorable.

Overall, Mallu Singh works as a mass entertainer with its commercial elements well in place, but it lacks novelty in story and screenplay. The film's strength lies in its performances and the chemistry among the lead actors, which keeps the audience engaged despite the familiar plot structure.

Unni Mukundan: Delivers a confident and energetic performance, effectively portraying the dual roles with distinct mannerisms.

Kunchacko Boban: Provides solid support with a natural and charming presence, adding to the film's lighter moments.

Samvrutha Sunil: Offers a pleasant and convincing portrayal of the female lead, contributing to the romantic subplot.

Biju Menon: Impressive in a pivotal role, bringing intensity and gravitas to the conflict-driven parts of the story.