Superball Flower

Superball Flowers, originally called flowers or super flower, are power-up flowers that were first introduced in Super Mario Land and reappear in Super Mario Maker 2 30 years later, holding the longest gap between appearances of a power-up in the Mario franchise. Superball Flowers turn Mario into his Superball form, giving him the ability to shoot Superballs.

Super Mario Land
Flowers are very similar to Fire Flowers in appearance and in abilities granted, and can only be found in blocks if Mario is Super Mario or won in the bonus game. Superballs are Super Mario Land's equivalent to fireballs; only one can be fired at a time, though, and they bounce diagonally at 90° angles. Superballs will collect any coins they make contact with. While one fireball can typically defeat any non-boss enemy, many enemies require multiple superballs to defeat. Superball Mario looks identical to Super Mario.

Super Mario Maker 2
In Super Mario Maker 2, Superballs are only available in the Super Mario Bros. game style as an alternate form of the Fire Flower, and retain their properties from Super Mario Land; Superballs can additionally light Bob-ombs, collect Keys and Pink Coins, and activate P Switches and POW Blocks. The character who picks them up takes on monochromatic shades of green, and the background music will also change to Birabuto Kingdom's ground theme for that character. Superball Flowers are unlocked for use with Course Maker in the Story Mode by finding a ? Block that is initially covered by Hard Blocks; after Mario is given the job Spiny Shell Smashers by Purple Toad and clears it, the blocks will be removed, allowing Mario access.