OG Koi

Hatching

Egg	Chance
Super OG Egg	1 in 5 billion

Form	Chance per hatch
Normal	1 in 5 billion
Shiny	1 in 200 billion
Mythic	1 in 500 billion
Shiny Mythic	1 in 20 trillion
XL	1 in 2.5 trillion
Shiny XL	1 in 100 trillion
Mythic XL	1 in 250 trillion
Shiny Mythic XL	1 in 10 quadrillion

Base odds, before any boosts.

Forms

Level 1Level 25

• 

  Normal

  Bubbles

  +8,200

  Gems

  ×145

  Coins

  ×5,000

  Copies

  5,000

• 

  Shiny

  Bubbles

  +12,300

  Gems

  ×217.5

  Coins

  ×7,500

  Copies

  413

• 

  Mythic

  Bubbles

  +14,350

  Gems

  ×253.75

  Coins

  ×8,750

  Copies

  170

• 

  Shiny Mythic

  Bubbles

  +18,450

  Gems

  ×326.25

  Coins

  ×11,250

  Copies

  13

• 

  XL

  Bubbles

  +20,500

  Gems

  ×362.5

  Coins

  ×12,500

• 

  Shiny XL

  Bubbles

  +30,750

  Gems

  ×543.75

  Coins

  ×18,750

• 

  Mythic XL

  Bubbles

  +35,875

  Gems

  ×634.38

  Coins

  ×21,875

• 

  Shiny Mythic XL

  Bubbles

  +46,125

  Gems

  ×815.63

  Coins

  ×28,125

Form	Bubbles	Gems	Coins	Copies
Normal	+8,200	×145	×5,000	5,000
Shiny	+12,300	×217.5	×7,500	413
Mythic	+14,350	×253.75	×8,750	170
Shiny Mythic	+18,450	×326.25	×11,250	13
XL	+20,500	×362.5	×12,500
Shiny XL	+30,750	×543.75	×18,750
Mythic XL	+35,875	×634.38	×21,875
Shiny Mythic XL	+46,125	×815.63	×28,125

Trivia

• It comes from Bubble Gum Simulator, where it was called Koi.
• Concept art by @alrafus.

History

1. 14 Nov 2025Update 29

   Added, hatching from the Super OG Egg.

2. 28 Nov 2025Update 31

   Removed from the Super OG Egg when the OG Event 2025 event ended. Trading is now the only way to get one.