I love how you can use your Apple phone for just about everything from entering to food but why can't you make a app for my watch it would be great just to take that instead of carrying my phone 

WatchOS is still a very limited operating system, I don’t know they could do much with an app on there. I’d rather them accept Apple Pay which I’d use way more often with my watch.

I usually one take my watch in.  I have our passes loaded on my watch.  

If you haven't heard of Ride Forces, it's an app for your Apple watch that will track the G forces during your rides.

 

No need for an app you can already use the Apple watch instead of the phone. 

First add the season pass to the Kings Island app which it sounds like you already did.  Then open the pass in the app and add it to your wallet.  The items added to your wallet will sync to your watch.  To display your pass just open it in the wallet app on your watch.  As a warning some of the scanners around the park have a hard time scanning my watch, but it does work.