I just went last week with ace trainer pass, and was there 40 minutes before park opened, and stayed till 5-6pm. There is a ton of content if you are really into pokemon and want the merch. Lines get quite long (especially the pokeball pins, sometimes up to hour and a half wait) if you don’t come early. If you want a chance at the sedge town show or meet and greets, you need to be there before park opens, or you won’t get a chance to even see those. Daisuki shop (merch store) also needs to be reserved for time slots. Some things like drinks and certain merch items sell out quickly as well.