It seems you're looking for information on "Night at the Museum" dubbed in Tamil, potentially for a 2021 release. However, the original "Night at the Museum" film was released in 2006, and its sequels, "Night at the Museum: Battle of the Smithsonian" (2009) and "Night at the Museum: Secret of the Tomb" (2014), followed in subsequent years. There's no official "Night at the Museum" film released in 2021.