Combi Challenge (August 2015 event)

Combi Challenge! is a limited-time event that started from August 14 and ended on August 27. In this event, players are required to complete certain goals with different kinds of combinations. Every combi comes with their own prize, and can be earned when a certain number of goals have been completed.

Each prize can only be claimed once, and players can use any boost with the exception of Cookie Relay. Players can play in all episodes except Ghost Pirate's Island of Coins.

Walkthrough
General tips for unlocking new cookies can be seen in this blog post.

Vampire Cookie + Oak Barrel - Reach Stage 6 in Episode 6
Obviously this is a typo. The correct goal is "Reach Stage 6 in Episode 3". However, because the energy drains very fast in Dragon's Valley, you need to equip "25% Slower Energy Drain" from Random Boost.

Achieving high points
You can run in The City of Wizards where Dark Moon Jellies will help you getting higher scores. You can either use "25% Slower Energy Drain" or "15% Points Bonus" from Random Boost, but slower energy drain is much more recommended. Because Dark Moon Jellies cannot be attracted by magnetic aura, sometimes it's not very much important to use treasures with magnetic aura, and rather focusing on treasures that slows your energy drain.

List of Missions
For finishing certain amount of mission goals above, you will get the bonuses below. Mission goals can be cleared in any order.

Trivia

 * Several combis in the game is not listed in the Combi Challenge! event. For example, they did not list Cherry Cookie's other combis other than her combi with Rocket Firecracker and they did not list Mint Choco Cookie's combi with Paprika Punching Bag.
 * Even though they show up in this event's newsletter, Lime Cookie and her pet, Mr. Beep Beep are not released yet in LINE at the time of this event.
 * There are two mistakes in Vampire Cookie's missions.
 * The first one is Vampire Cookie and Oak Barrel's mission, which requires the player to "Reach Stage 6 in Episode 6," which is nonexistent. The actual mission is to "Reach Stage 6 in Episode 3."
 * The second one is Vampire Cookie and Rare Garlic's mission, which requires the player to "Reach Stage 6 in Episode 4." The actual mission is to "Reach Stage 4 in Episode 3."

Similar Events

 * Combi Missions (7-16 November 2014 event)
 * Combi Missions! (14-24 August 2014 mission event)