There is this glitch I have discovered a few months ago that I never found on the internet, so I have crowned it with the creative name "File Deletion Glitch." To perform it, you delete a file and leave at the correct time to remove only around 5% of your save file, while making the game think its a brand new file.

This glitch still lets you keep; Skills, Cards, Gear, Collectables [aside from Backpacks and Wallets, but it includes the magical stone (if you had multiple they get traded for thin air)], Items, Quests [basically your current quest is deleted but completed quests are still completed, so you can not get Prove Yourself]

This can be pretty powerful, considering you have completed ALL quests automatically AND have the Magical Stone at level 1, but it's technically a new file!

[random fun fact: the top left area of the Explore the World! thumbnail is not hidden woods, but an unused area Mellow Woods which was replaced for being "too easy" because of the new skills added in Frogidi's Fortunes]