The Mutation Serum is an item in Kick the Buddy,located in the Bio Weapons page and costing 149 gold.

When selected,the player can tap the screen to spawn in a fluke with mutation serum inside of it.When thrown on Buddy,he will first become very small and his skin turns green ,then to his normal size and his skin turns blue, and then much larger and his skin turns purple.

It is very tricky,but if the player throws the fluke down in the ground in just the right y position,it won't break until it hit the wall or if buddy touches it.

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