In-Game Description-The power of seven dragons surges through this famed ball.
The Rainbawl is the seventh and final one of the Balls. It can be unlocked at level 47 for 120,000 coins. Completing one session receives 65,000 XP and 4,000 Coins. Hence the name, the Rainbawl has an appearance with all of the colors of the rainbow.
Awkwardly, the Rainbawl has colors that appear in the rainbow.