Indignant Machine appears on Nights 3 and 4 of the Inaba Pride Exhibit, ambushing the party at P-Spots. It has particularly strong Physical-elemental attacks along with Colossal Swing that occasionally adds a splash effect, so avoid placing party members with similar weaknesses next to each other. When defeated, it may drop Machine Piece and Machine Mallet. Machine Piece is used to create the Bluster Knuckle for Akihiko. Machine Mallet is used to create the Kuroito-odoshi male armor.