Guppy's Eye

Guppy's Eye is a passive item added in The Binding of Isaac: Repentance.

Effects[]

Displays the contents of Chests, Sacks, and Fireplaces before they're opened via icons placed on top of them.
This item belongs to the Guppy set. Collecting three items from this set will transform Isaac into Guppy.

Guppy's Eye does not show the contents of tinted rocks, Poops, and other obstacles.
Guppy's Eye does display enemies that can be contained within chests.
Chests and Sacks can only display up to four pickups at a time. If there are more than four, higher-value pickups like Bombs, Keys, and Soul Hearts will have priority on the display.
If a red chest looks like it doesn't have anything in it, it will teleport Isaac to the floor's Devil Room/Angel Room.
Due to how Trinkets generate, if a chest displays a trinket, all future chests will also display/give that trinket until it spawns in some way, at which point all chests will display a new trinket.
Mimic Chests will change their contents whenever their spikes pop out. The only way to get the original drops is to open it with Flat File or Magneto.
This effect works on all non-ending chests, including Mom's chest.

This item was suggested on a Reddit post on the Binding of Isaac Subreddit.
Before it was added in The Binding of Isaac: Repentance, Guppy's Eye was an item in The Binding of Isaac: Four Souls, in which it forces all other players to play with their hands face-up on the table.

PC L4WH 88YF (Curse Room adjacent to spawn)

Bug!	If a Chest or Sack disappears due to Options? or the G0NE S00N seed, the preview of the Chest/Sack's contents will remain on screen where the chest was.

Bug!	Does not work in crawl spaces.

Pet Items

Cricket:

Guppy:

Tammy:

Cain Unlocks