Number Ball Special
From the Super Mario Wiki
Number Ball Special is an unlockable level in world three of Yoshi's Island DS. White Yoshi appears here for the third time. Unlike A Light in the Dark, a secret level before it, Baby Wario is playable here.
On a side note, this is one of two levels to feature the special Gargantua Blargg.
The level starts outside with a pipe nearby which leads Yoshi to a cave with a Stork Stop and a door nearby, the latter housing a Number Ball. The second ball is found in another room, along with a mace and an Egg Block. Some enemies protect the third Number Ball in a nearby area, while another ball is found behind a row of coins and some enemies. The last ball can be found next to some enemies, and putting all the balls in their respective slots makes a pipe show up which leads to the goal roulette.
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