I'd like to compile what's hacked and not hacked. These hacks and methods below are undetected by in-game cheating mechanism (crappy summon - D & C items/characters and unable to access shop).
Confirmed Hacks
Group Items (Mystic Flute, Energizing Stew, Power Orb, Royal Gift, Miracle Mallet, Pouches, Trophies, Kairo Flans, etc) & Summoning Tickets**
Food & non-food items (i.e. sturdy board, large nails, strong rope, etc)
Town Materials (Wood, Gems, Ore, Grass & Food) & Energy
Character Status**
Game play speed**
** These categories are hack-able with certain limitations. Summoning tickets are hack-able until 999, character status is best to be hacked within their limit and Game play speed is best set to x5 in GG. Research/Upgrade speed won't be affected as they are affected by your device clock. More explanation below.
Unconfirmed Hack
Gems
Methods
Group Item & Summoning Tickets**
Search for the total summoning ticket or group item quantity. Use 1, search for new # and keep repeating until you find a list of workable results (up to your preference). The only number that significant is 2 DWORD values shown below.
2. Items (Food and non-food items)
Search any item you like to hack. In this example I will be using Healthy Mushroom. I have 10 in my town #1 storage.
Use 1 of them and search for DWORD with value of 9. Keep repeats this process until you find a single search result.
If you clicked on GOTO, it doesn't have any significant number below it.
Use Healthy Mushroom to any/all residents. The value will change to (# of item you set in GG - # of item available in your storage) 91. I have 10 to start with, used 2. I changed its value to 99 and after i used all 91 of them to all my residents, the item will disappear from your storage. Keep in mind, you can use any numbers of Healthy Mushroom to any residents. The item will still be available until you restarted your game.
3. Town Materials (Wood, Gems, Ore , Grass & Food) and Energy
4. Character status**
This can be done similarly with category #3 and #4 above. You will have to find the current and maximum value of your character. I have my Rancher with current Speed value of 30. I use Wairo Creamy Cake to increase to 33 and then used GG to max it to 60. This method seems useless if you already have Wairo Creamy Cake or something similar. If you set your current speed value and maximum speed value allowed to, in this case 60, then your character will not be benefited from this change.