How can I get to Madame Tussaud from Mongkok east or Royal plaza hotel in Hong Kong

The Madame Tussaud is on the top of the Peak, so you need to reach the Peak first.

You can walk along the Prince Edward Road East to Mong Kok Station, where you can take the Tsuen Wan Line to Central Station directly. Get out of the station from Exit J2, you can follow the direction boards to walk to the Peak Tram Station on Garden Road. There you can take the Peak Tram to reach the top of the peak. Then you can walk to the Madame Tussaud Museum.