Things you can do with just One bus staying at the Disneyland Resort.
Walking - Anaheim GardenWalk, Anaheim Convention Center, Many Restaurants and Shops like Walgreens and CVS.
LA Metro Route 460. (runs every 30 minutes from 5 AM to Midnight, seven days a week)
Knott's Berry Farm, Knott's Soak City, Medieval Times, Pirates Dinner Adventure, Buena Park Downtown (Shopping), 20 minute trip
Staples Center (LA Kings, Clippers and Lakers), LA Convention Center, Downtown LA. (Bus uses freeway, does take about 90 minutes)
OC Bus 50 or ART Bus Angel Stadium, Honda Center, ARTIC (Train Station)
ART Bus - The Christ Cathedral, The Outlets of Orange (Shoppertainment Complex), South Coast Plaza (High End Shopping)
OC Bus 43/543 - Newport Beach, Fullerton Train Station, Large amount of Shopping at the corner of Orangethorpe in Fullerton including COSTCO
OC Bus 83 - Main Place Mall, Discovery Cube Science Center, Bowers Museum, Laguna Beach (Bus uses Freeway)
ART CtrCity Bus - Anaheim Packing House, MUSEO, CtrCity (fancy name for Downtown Shopping), Anaheim ICE (Ice Skating/Ducks practice rink)
Starline Tour Bus - Hollywood and Highland Center, El Capitan Theater (Disney Theater), Jimmy Kimmel's Studio, Hollywood Walk of Fame, Madame Tussard's Wax Museum, Hollywood Wax Museum, Ripley's Believe It or Not!, The Hollywood Museum, transfer to multiple Starline Tours.
Using a train (either AMTRAK or Metrolink) or Metrorail after the one bus trip. -Old Town San Diego (SeaWorld), Downtown San Diego, USS Midway, Star of India, Oceanside Pier and Beach, San Clemente Pier and Beach, San Juan Capistrano (Famous Mission), Universal Studios Hollywood and CityWalk, Santa Monica Pier and Pacific Park (Amusement Park), Ex[position Park, California Science Center, Natural History Museum, LA Coliseum (Rams, Trojans), Banc of California Stadium (LAFC). Long Beach, Aquarium of the Pacific, Queen Mary, Six Flags Magic Mountain and many more.