Any bus goes from Hongkong International airport to Kowloon Marcopolo hotel ?

You must refer to the hotel at Canton Road, Harbour City. Well, bus no. A21 is available. By it, you can get off at Middle Road, Nathan Road, then walk to your hotel.

Or you can take Express Train to Kowloon Station, where transfer to free shuttle bus no. K2 to your hotel directly.