It's comforting to fight alongside trained warriors when going on a dangerous quest, but that doesn't mean one should let slide their own personal training. In Cookie Run: Kingdom there are many cookies that are already inherently powerful but as you go through the different missions, enemy power will quickly grow against you.
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This means you'll need to be able to swap out different cookies as need be while also doing what you can to strengthen individual cookies. As long as you keep them within reach of the enemy power levels, you'll be able to take your team to victory and even further.
Anytime you're outside a mission, you can access the cookie screen. From there, you can see and arrange all the cookies you have and don't have. By choosing a select cookie, you can see all of their different stats as well as their overall power level. There are multiple ways you can improve a cookie's power which is mainly through boosting one of the following aspects: Level Up, Ability Level, Ranking, and Toppings.
In true RPG fashion, your cookies will earn EXP by going on missions. When their yellow bar fills up, they will gain a level.
Through activities, cookies can level up naturally by either successfully completing missions or by completing tasks in the kingdom. However, those actions grant a very small amount of EXP and so are not recommended for dependence in the long term.
Instead, cookies rely on a diet of consumables known as Star Jellies, which are earned by completing objectives, generating them from Houses, and buying them from different markets. Once you have enough, go to the cookie's stat screen and level them up rapidly by feeding them Star Jellies. Their level
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