from mongkok hostel going to hong kong disneyland and ocean park, which is cheaper? mrt or bus?

So you refer to the cost of transportation? Well, it costs less for Ocean Park. Walk from your hostel to Dundas Street, Nathan Road and take bus no. 171. Get off at Aberdeen Tunnel Toll Plaza and walk south to the park. In this way, it takes half an hour and costs 11.1HKD.