Best way to go to HK disneyland and ocean park from royal view hotel 353 castle peak rd (tiag kau).

1. To Disneyland: You may walk about 300 meters to Ting Kau Bus Stop and take bus no.243B to Tsuen Wan Railway Station. Upon arrival, you may take Tsuen Wan Line to Lai King Station and transfer Tung Chung Line to Sunny Bay Station. Later, you may catch Disneyland Resort Line to Disneyland Resort Station, Exit A. Upon arrival, you just need to walk about 150 meters to the entrance. The whole trip may take around 70 minutes and the ticket fare is HK$22/person.
You can also take a taxi there at a cost of around HK$140 in the day time.

2. To Ocean Park: You also need to take bus no.234B to Tusen Wan Railway Station. Then you may take Tusen Wan Line to Lai King Station and transfer Tung Chung Line to HK Station. After that, you may walk to Central Station and take Island line to Admiralty Station. Later, you can take South Island Line to Ocean Park Station. When you get out of the station, you can see the destination directly. The whole trip will take around 75 minutes and the ticket fare is HK$19.3/person.
If you take a taxi, the taxi fare may be around HK$210.