Chocolate Levels are one of the level types in some fanons like Candycrush071's Candy Crush, Candy Crush Sunny Saga and Candy Crush 811's Saga (CC811). This level type doesn't exist in the original game, but exists in a similar way in Candy Crush Soda Saga.
In CC071, Chocolate levels are very common after their introduction in Level 476, however they are introduced very late. Episodes after Espresso Emporium (when they were introduced) tend to have at least 2 of this level type, with some exceptions. They have even surpassed Timed levels as the 3rd most common level type. The song played in this level type is the same as the Jelly song on mobile (Ingredients song on Facebook).
Candy Crush Sunny Saga
In Candy Crush Sunny Saga, chocolate levels are introduced in Level 51. Their appearances are fairly common, through appearing 3 to 5 times in one episode. However, after mixed levels are introduced, the number of chocolate levels should decrease.
In Candy Crush 811's Saga (CC811), Chocolate levels are introduced in Level 111 in Chocolate Caves (CC811). Chocolate levels are slighty common. Later episodes tend to have 1 to 3 chocolate levels. Some few episodes don't have even one. however it's more common than timed levels.
See also List of chocolate levels (T9CCS).In T9CCS, chocolate levels are introduced at level 76. They are pretty common, being in every episode after Bubblegum Bay. There are usually 1-3 chocolate levels per episode. These are as common as Jam and Order levels, more common than Moves and Timed but less common than Ingredients or Jelly.
To win a chocolate level, the player must clear all the chocolate on the board. However, chocolate can spread and you will need to clear those additional chocolate too. If chocolate spawners are present, it becomes even more difficult, because the task will be completed only when there is no chocolate on the board, before new ones spawn. Clearing one chocolate in chocolate levels gives you 1,000 points rather than just 20.
When all chocolate has been cleared, a striped candy is made for every move remaining, giving 3,000 points for each. Then each of the striped candies activate themselves.