Hope this helps some of you from WA or anyone coming to visit! Make sure you check Entertainment Book as well as some have better discount on there.
Cicerellos Fremantle/Mandurah - 10% off (purchase >$50)
Skydive Australia - $30 off a 14,000ft jump
Fremantle Opals - 20% off (off full price)
Willie Creek Pearls - 20% off to Pearl Discovery Tour
Maritime Museum Fremantle - 25% off admission
Swan River Seaplanes - 10% off tours
Captain Cook Cruises - 15% off 'Perth's Famous Wine Cruise' OR 10% off adult tickets on other cruises
Adams Pinnacle Tours - 10% off day tours
Bell Tower - 20% off adult entry price
Rockingham Wild Encounters - 10% off Penguin and Sea Lion cruise\Penguin Island Wildlife Cruise
Thrifty Car Hire - Free GPS hire when hiring 'nifty' car
Fremantle Tram Tour - $5 off
Perth & Kings Park Explorer Bus Tour - $5 off
Rottnest Express - 15% off day tour packages and same day return ferry fare
Rottnest Fast Ferries - 15% off Day Returns, 2 hr Whale Watching cruises
Whiteman Park - $5 off
Explore Tours Perth - 10% off
Mandurah Cruises - 10% off
Tours with a Twist - $10 off
Segway Tours - 20% off
Esplanade Hotel, Fremantle - 20% off your dining bill
Mandurah Dolphin Tours - 10% off
EBikers - 15% off electronic bike hire and a free coffee (Fremantle)
Quilpie Opals Perth - 30% off
Super Roo Eco Tours - $10 off adult and $5 off child tickets
Lone Ranges - Free 22LR Rifle Shooting Package when >$100 spent
Outback Jacks NORTHBRIDGE ONLY - 10% off bill, up to $40 discount
C Restaurant - 10% off final bill
Exmouth Diving and Whaleshark centre - 15% off
Here's the website just in case you need to show it: https://www.helloperth.com.au/exclusive-discounts/