Mixup 5x5x5 is a twisty puzzle where many more pieces can swap place than one would expect. The puzzle has 262 pieces, of which 66 inter-swappable "squares" and 72 inter-swappable "spacers" between them. Each "square" can be in any of its four orientations. The name of this puzzle is ambiguous, as there are 9 pieces in a row at the edges. Still, the base puzzle is a 5x5x5. For the specialists: this puzzle jumbles and it is fudged.