Hidden Block

'''Invisible ? Blocks (also called Invisible Blocks or Hidden Blocks''') are ? Blocks that are invisible to players unless they hit the block. Invisible ? Blocks first appeared after the fourth pipe in World 1-1 in Super Mario Bros., which contained a 1-Up Mushroom. Invisible ? Blocks did not have an appearance as when hit, they turned into Used Blocks.

In the Paper Mario and Mario & Luigi series, the player may come across invisible ? Blocks containing coins, healing items, badges, and so on. In the Paper Mario games, such blocks can be found by using partners that can detect hidden items on the field.

In Super Mario Maker, Invisible Blocks were given a sprite for use in Create mode, and as a partially-transparent grey ? Block.