Secrets

Massive Diamond locations
Listed in order of availability and closest proximity to the party as the story progresses:
 * 1) Dropped from Corebros when defeated in the Rainbow's Basement? dungeon.
 * 2) Dropped from Bad Cupcake when defeated in Pinkie's B&B&D (initiate by inspecting pink package on table).
 * 3) Make a rope bridge at the most northwestern corner of Ferus Wastelands after Applejack joins the party. Inside treasure chest.
 * 4) Dropped from Singularity Blue and Singularity Pink when defeated in the Neon Labyrinth.
 * 5) Dropped from Danny Devito when defeated in Danny Devito's Lair. Re-enter the entrance to the Neon Labyrinth after the dungeon's destruction (now titled Mysterious Ruins) and pick up the Mysterious Ruby inside the treasure chest. Find the entrance to Danny Devito's Lair at the easternmost side of Ferus Wasteland and use the Mysterious Ruby to open the door within.
 * 6) Make rope bridges to cross east of the river in the Uncanny Valley, and search the southeastern most area. Inside treasure chest.
 * 7) Dropped from Cutie Boom when defeated in the Twist Camp region of the Uncanny Valley.
 * 8) Make a rope bridge to cross the chasm inside the Ponett Cave Hub area of Ponett Town.

Fluttershy's Property

 * 100 bits can be found underneath Fluttershy's couch.

Ponett Town

 * The pink tent is a feature, not a bug.
 * Upon inspecting the single orange tree in the Apple Orchard as Applejack, she remarks, "Oranges? What the hey are these doin' here?"
 * There is a 1 in 30 chance that Spike appears as his Equestria Girls dog form when accessing the Beastiary in the Ponett Public Library.

Ferusian Border

 * Along the westernmost side of the wall is tagged with graffiti: "I ♡ Cadence." The graffiti is absent at the beginning of the game, before meeting Javis.

Mt. Gay

 * Upon finding the Apple Pie item on Mt. Gay 4F, the dialogue differs depending on if your party has found Applejack yet or not.
 * If Applejack isn't in the party, the dialogue goes as follows:
 * Rainbow: "Aw man I bet AJ would get really excited about this"
 * Fluttershy: "I'm sure we'll find her soon, dear."
 * If Applejack has been found, the dialogue goes as follows:
 * Applejack: "Boy howdy! This is the best thing we've found in one of these chests all day."
 * If the party does either of the following before talking to Twilight in the room she is teleported to, different dialogue will be triggered.
 * Attempting to open the treasure chest first:
 * Twilight: "Really? Did you HAVE to check the chest before even saying hello to me?"
 * Fluttershy: "Sorry, it was just so enticing."
 * Rainbow: "Maybe if you were flashing like the chest then we'd be more interested in talking to you"
 * Attempting to leave the room:
 * Twilight: "Are you seriously trying to leave without me?"
 * Fluttershy: "Oh, Twilight! We didn't notice you there."
 * Twilight: "The room is practically empty. It's a white void."
 * Rainbow: "What's your point"