Water Balloon is the smallest contestant on the show, and he uses this fact in various pranks. He can also be a bit curious, but usually not to the extent that Scrolly is. For some reason, he and Pie do not get along very well. He is also afraid of the number 43.
- Water Balloon was the first contestant to speak in Object Trek.
- Water Balloon is the smallest contestant on Object Trek.
- He is also the only one-eyed contestant.
- Another Water Balloon appeared on Super Object Battle, but they have different personalities.