Pokémon Triangle Error Base Set Sealed Booster Pack (Wizards of the | Lot #36140 | Heritage Auctions
![PSAcard on Twitter: "If you happen upon an unopened #Pokemon pack and notice a little black triangle on the bottom right, then it's your lucky day. Those packs are known as "Black PSAcard on Twitter: "If you happen upon an unopened #Pokemon pack and notice a little black triangle on the bottom right, then it's your lucky day. Those packs are known as "Black](https://pbs.twimg.com/media/DpV9g4FU0AAp9wq.jpg)
PSAcard on Twitter: "If you happen upon an unopened #Pokemon pack and notice a little black triangle on the bottom right, then it's your lucky day. Those packs are known as "Black
![Ando 🍃 on Twitter: "GUYS HELP ME IM DIEINGGGG!!! DO I HAVE AN EXTREMELY RARE ERROR BLACK TRIANGLE BASE BOOSTER BOX!?? https://t.co/wpmuvjWngN" / Twitter Ando 🍃 on Twitter: "GUYS HELP ME IM DIEINGGGG!!! DO I HAVE AN EXTREMELY RARE ERROR BLACK TRIANGLE BASE BOOSTER BOX!?? https://t.co/wpmuvjWngN" / Twitter](https://pbs.twimg.com/media/CrjMjlfVYAAUIj3.jpg)