Superball Flower

Superball Flowers, also called flowers or super flower , are power-up flowers that were first introduced in Super Mario Land for the Game Boy. 30 years later, they reappear in Super Mario Maker 2.

Superball Flowers turn Mario into Superball Mario. This gives Mario the ability to shoot superballs.

Game information
Superball Flowers are very similar to Fire Flowers. Not only do they look very much alike, but they also give the player similar abilities - superballs are the game's equivalent to fireballs, although they behave slightly differently (ricocheting off all surfaces at 90° to arrival rather than remaining low, only one can be fired at a time) and they can collect coins when fired at them. However, in Super Mario Land, Superball Flowers do not change Mario's appearance at all.

In Super Mario Maker 2, they make Mario light and dark shades of green, similar to Super Mario Land, which was in black and white. It is unlocked by clearing the job, "Spiny Shell Smashers", given to Mario by Purple Toad. The power-up is hidden in a ? Block that is covered by Hard Blocks, preventing access to the power-up.

Trivia

 * The Superball Flower has had the longest absence of all other power-ups in the Super Mario franchise, spanning over 30 years.