Taito later repacked Bust-A-Move 2 with an optional alternative set of levels and some new attract mode animations (including holiday-themed ones) as Bust-A-Move 2X (Also known as Puzzle Bobble 2X).
Ports of Bust-A-Move 2 to the PC and Sega Saturn are of Bust-A-Move 2X and additionally include a level editor/designer. A port of 2X was made to the PlayStation but was not released until some time after a port of Bust-A-Move 2 was released; therefore, it is not so well known.
Read more about this topic: Puzzle Bobble 2