According to Official Guinness Records,
The most mechanical figures in a nativity scene is 162 and was achieved by Manuel Jacinto (Portugal), in Santa Maria da Feira, Portugal, on 10 November 2013.
The nativity scene is displayed free as an annual event that lasts from November to March and has been exhibited for the last 9 years. There were many more mechanical figures of different sizes, shapes and era but the record concentrated around the time of the nativity.
For a complete list of 2013 records, please visit 2013 Guinness Records in Portugal.