An anchor was an item that was used in the Nintendo Entertainment System video game Super Mario Bros. 3. In the game, Mario or Luigi would use the item to tie down airships so that they couldn't move around the worldmap. In the game, if the player failed to tackle an airship, then it would move to another location which would on occasion require the player to complete another level or take on an enemy stage. With the anchor, if you failed to complete the stage, the airship would be unable to go anywhere. The item returned in the game's various remakes for the Super Nintendo Entertainment System, Game Boy Advance, and Virtual Console (re-release).
An anchor is a rare item in the game and are exclusive to the white Mushroom Houses (in the even numbered worlds only). The player will have to pay the Toad a set number of Coins in order to come in possession of an anchor.