What is a 'Lucky Monster'?

What is a 'Lucky Monster'? - Japanese Lucky Coin Cat

I have collected enough cards to be able to setup a bonus, however I've no idea what a Lucky Monster is.

Pirate Generation - Damage +100% to Lucky Monsters.

Pirate Generation - Damage +100% to Lucky Monsters.






Pictures about "What is a 'Lucky Monster'?"

What is a 'Lucky Monster'? - Sky Lanterns
What is a 'Lucky Monster'? - Green Plants on Black Soil
What is a 'Lucky Monster'? - Red Lucky Cat Neon Sign





I Don't Know What Is Happening To My Little Daughter : THIS VIDEO WILL MAKE YOU CRY




Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.

Images: Miguel Á. Padriñán, mahe haroutinian, Sudipta Mondal, Momo