James Potter and the New Marauders

Four students- James Potter, the heir and namesake of the Marauders legacy; Frank Longbottom, a quick-minded prefect with a penchant for bending the rules; Fred Weasley, a wildcard with a fiery passion for mischief and mayhem; Sovereign Black, a brilliant witch recently transferred from Ilvermorny and our point of view character. What mischief can they manage, exactly?