Bean Drop Duo (sometimes called as Pea Pet) is an E-grade pet that was released on January 22, 2016. It was released to celebrate LINE Cookie Run's 2nd anniversary.
This marks the second E-grade Pet in LINE Cookie Run. The first E-grade pet in LINE Cookie Run is the White Gold Drop, which could only be obtained by buying the White Gold Drop Package in the Package Store.
In the Witch's back yard, grew a magical beanstalk. But one day, a strange looking bean started sprouting out of it! Hence this long and unique buddy was born. And not only one, but two beans were born!
Bean Drop Duo has the most expensive upgrade cost in the entire of Cookie Run, with 256,000 needed to upgrade from level 7 to 8. However, the total upgrade from level 1 to 8 is still cheaper than L-grade cookies such as Tiger Lily Cookie and Fire Spirit Cookie.
The cost for each upgrade is multiplied by 2. For example, the 1st upgrade costs 4,000 and the 2nd upgrade is twice the amount of the first upgrade, hence the 2nd upgrade costs 8,000. Because of the continuous multiplication of 2 (due to the game's 2nd anniversary), the Level 7 to 8 upgrade for Bean Drop Duo costs 256,000, which is nearly the amount needed to fully upgrade a normal S-rank cookie.
For some reason, the Bean Jellies that Bean Drop Duo produces are counted as Alphabet Jellies, and they represent the letter "E" in BONUSTIME. Coincidentally, it is an E-grade pet.
Bean Drop Duo actually is a meme of Jin-Ho Hong (ko: 홍진호), the well known as most got a second place of Starcraft (not 2) Korea league pro gamer (YellOw). And his last name 'Hong' sounds similar to 'Kong' (in English, bean). So it has many number '2' in price, upgrade cost (each doubled than before), description or in-game ability and design is based on bean pod that has a two of bean.