Binding of Isaac: Rebirth Wiki

Added in Repentance

TMTRAINER is an unlockable passive item added in The Binding of Isaac: Repentance.


  • When picked up, all future items become "Glitched", causing them to become random combinations of 2-3 effects based on other items as well as effects that are not normally controlled by the player, such as enemy spawning and other behind-the-scenes effects.
  • "Glitched" items can be passive or active and are completely randomly generated with practically infinite possibilities.
  • Random effects combine effects that exist on other items, and assign them to a random event (e.g. on enemy death, on room clear, on damage taken etc.).
    • These effects may also be derived from installed modded items.
  • Glitched items sold for money cost a random amount of pennies up to 99 pennies.


  • Once Corrupted Data Corrupted Data is unlocked, the TMTRAINER effect may be randomly applied to items found in Secret Room Secret Rooms and I AM ERROR I AM ERROR rooms.
  • Items affected by TMTRAINER may take the effect of rerolling all of your items. This includes TMTRAINER itself, meaning any future items you encounter will not be under its effect, nor will the items obtained by rerolling due to the glitched item.
  • All glitched items appear as Mega Blast Mega Blast in Isaac's Last Will or the In-game Pause Menu.
  • If an item held by Isaac is rerolled into TMTRAINER (Either by D4 D4 or a 1-pip Dice Room Dice Room), all items after it will be rerolled into glitched items.
  • A majority of the random item effects include farts, including active items.
  • Due to the sheer randomness of glitched items, some may cause the game to either crash or lag to the point of unplayability.
    • However, some may spawn entities that are normally only accessible using the Debug Console, including the Challenge Trophy that spawns at the end of Challenges and the Big Chest that spawns after most major bosses. Touching either of these on a floor that would not normally spawn them will instantly end the run and send the player back to the title screen (unless a challenge is currently being played, in which case the player will receive unlocks as if they had completed the challenge normally). Touching a Big Chest on any floor that can spawn them will NOT give the player the respective completion marks but will still end the run (unless Isaac has either The Polaroid The Polaroid or The Negative The Negative and is on either Cathedral Cathedral or Sheol Sheol, respectively.)


  • 'M 'M: Rerolls glitched actives into other glitched actives.
  • Bag of Crafting Bag of Crafting: Recipes are not glitched.
  • Binge Eater Binge Eater: Functions as intended, cycling pedestals between a glitched item and an HP up item.
  • Book of Virtues Book of Virtues: Glitched actives spawn random wisps upon use.
  • Death Certificate Death Certificate: TMTRAINER will not apply to Death Certificate's items.
  • Diplopia Diplopia: Glitched items are copied normally. Pedestals spawned before acquiring TMTRAINER will duplicate into a glitched item.
  • Dream Catcher Dream Catcher: Cannot identify glitched items.
  • Lemegeton Lemegeton: Spawns wisps of glitched items. All wisps look like The Sad Onion The Sad Onion, but this is purely aesthetic. The wisps do not have any items' effects.
  • Magic Skin Magic Skin: All summoned items will be glitched. Magic Skin cannot replace future glitched items after being left behind.
  • Missing No. Missing No.: Can reroll TMTRAINER, but not any previously acquired glitched items.
  • Modeling Clay Modeling Clay: Cannot transform into glitched items. Will visually vanish from sight, but is still held and can be dropped as normal.
  • Spindown Dice Spindown Dice: Glitch items will disappear if rerolled.
  • Tainted Cain Tainted Cain Can craft TMTRAINER but it will have no effect.

In-game Footage[]


  • The name and description of the item comes from the result of glitches in Pokémon Red and Blue. Certain glitch moves in that game can have names so long they run into the memory, corrupting it and causing glitchy effects, like the opponent's name becoming "TMTRAINER". A certain other glitch (commonly referred to as the ZZAZZ glitch) replaces the letters in the player's name with capital Zs except for every third letter.
    • The pickup quote for this item is defined as "Isaac and his mother lived alone in a small house on a hill", but in game it's shown with the pattern of Zs overlaid on top.
    • The music fading out and status effects being applied to enemies upon acquiring the item is another direct reference to the effects of TMTRAINER in Pokémon Red and Blue, which fades the music out upon use until another song is triggered to play (assuming the game survives the effects), as well as applying burn and frozen statuses to enemy pokémon.
  • The sprite for TMTRAINER itself is a heavily glitched version of Isaac's face, affected similarly to the face of Tainted Eden Tainted Eden in menus.
    • For the TMTRAINER sprite in particular is a reference to how sprites corrupt in Pokémon Red and Blue, especially after encountering glitch Pokémon, by segmenting into strips, then rearranged, usually flipped around.
  • The effect of the item is similar to a "Randomizer" for other games.
    • The item's effect is a reference to an old randomizer mod that came out before Afterbirth+[1].
  • This item is used in DELETE THIS (challenge #45).
    • DELETE THIS will always be unlocked before TMTRAINER on any given file. This item, The Small Rock The Small Rock, Dirty Mind Dirty Mind, and Spirit Sword Spirit Sword are the only items that appear in challenges before they are unlocked. Small Rock and TMTRAINER are also notable for not being unlocked by beating the challenge they appear in.
  • MEAT! MEAT!, YO LISTEN! YO LISTEN!, and TMTRAINER TMTRAINER are the only ALL CAPS items in the game. (PHD PHD is not counted since it's an initialism.)
  • Most glitched item sprites are shown as Mega Blast Mega Blast in Isaac's last will. Very rarely one will show a glitchy icon.
  • Sounds when picking up glitched items are often changed.