ByeBye Balloon

A ByeBye Balloon is an object in Wario World that is essentially a Glue Globe with several balloons — either red, blue, green, or yellow in color — attached to it. They are always found near the entrances to the bosses of levels. Wario can use the ByeBye Balloon to go back to the start of the level he is in and collect any missed treasures.

If Wario defeats a level boss and returns to the same level, a ByeBye Balloon is found near the start to take him to the midpoint of the level. This allows Wario to collect missed treasures faster.