With some misgivings, I have tried to be specific in my Guides where requirements for Events and Individuals are concerned, but each time I am specific, the requirement is proven false.
For example, there have been rumours to the effect that shipping at least 200 items, possibly from the shipping bin in front of Taro's house, is a requirement for Elliot's Purple Heart Event.
This has been proven false in two ways:
1. Players who did NOT ship 200 items were able to trigger the Event when Elliot reached purple heart level; and
2. Players who SHIPPED over 200 Crops from the shipping container in front of Taro's house were UNABLE to trigger the Event after Elliot reached purple heart level. One player shipped over 300 Crops from the shipping container in front of Taro's house and had Elliot almost at blue heart without being able to trigger the event...
Something else is going on here. As Farming Degree Points are the one consistent element in the game, I am attempting to discover if this may be an actual requirement, but so far nothing has been confirmed.
There is another possibility. In most Harvest Moon games, events are limited to specific days. I really would like to know what days players have been able to experience Elliot's Purple Heart Event. Characters have different schedules on different days of the week. I was able to experience Elliot's Purple Heart Event on Monday, but not on some of the other days of the week. Perhaps there are specific days when it can't be triggered and is as simple as that.
It is very possible that Event schedules will change depending on how many areas have been unlocked in a player's game, as the schedules of most characters change accordingly. For example, with respect to the Heart Events of characters who visit the Forest or Jungle on specific days, surely this will affect the schedule of any Heart Event. One will be obliged to play many different games to be able to pinpoint precise requirements in each situation.
1. Schedule of any Heart Event when only East Town has been unlocked;
2. Schedule of any Heart Event when only East Town and the Forest have been unlocked;
3. Schedule of any Heart Event when East Town, Forest AND Jungle have been unlocked.
In many cases, the schedule will be the same if the character is one who does not visit the Jungle or Forest... if he/she does, however, the schedule may be altered based on the days when the character would be in these areas.
It is rather vexing, in a way. Island of Happiness is far more complex than other Harvest Moon games where unlocking options and events are concerned. When players, including myself, were unable to experience Rival Heart Events, it did appear that the events were tied to specific items and shipping: shipping ores allowed Sabrina and Vaughn's events to occur, shipping Crops allowed Elliot and Julia's to trigger, shipping fish was the trigger to unlock Denny and Lanna's Events and cooking had the same effect with respect to Pierre and Natalie's Events. Is this in fact the case or is it simply a huge coincidence?
Even the Subsidiary Characters are not unlocked in the manner in which the original strategy guides claimed: you can bring ALL Fishermen apart from one to the Island in the first Spring without much trouble.
I do believe that the Mineral Town characters are unlocked when you achieve 50% completion in terms of the Island itself but possibly this will be disproven as well. In my own games, Popuri and Karen always are the first to arrive in the first Autumn season. If any one has managed to bring Mineral Town characters to the Island sooner than this, I would be interested in the details. I do believe that all bridges must have been completed in order for the Mineral Town characters to begin to appear.
In these circumstances, a Walkthrough for the first few seasons of the game probably is most helpful to players. I have written one and it is posted both here and as part of my General Guide for IoH. It takes the player from the start of the 1st Spring through Autumn to the arrival of Mark or Chelsea in the first week of the season.