List of ? Block items in Puzzle & Dragons: Super Mario Bros. Edition
From the Super Mario Wiki
In Puzzle & Dragons: Super Mario Bros. Edition, there are ? Blocks in most courses that give out items to the player if they complete certain objectives by arranging Orbs on the Orb field (making a match in a line either vertically or horizontally, matching a certain number of Orbs (in a group) or making a certain number of combos) in the allotted number of turns.
Depending on the world, the amount of coins rewarded to the player varies. From Worlds 1 and 2, the player is rewarded 10 coins, 25 coins from Worlds 3 and 4, 50 coins from Worlds 5 to 8 (though the player may be rewarded 100 coins when cleared with two objectives into levels with only coins), 75 coins from ★Worlds 1 to ★World 4, and 100 coins ★Worlds 5 to ★World 8 (though the player may be rewarded 250 coins with 3 objectives in levels with only coins).