Complete the indicated task to unlock the corresponding skin.
Play a bot match set to 0% bot skill on the "Sorona" map. If available, use the "Overgrowth" (-2 parts per Weedling) and "Bag of Seeds" (+1 or +2 Weedlings) skill upgrades. Place a Weedling over the Tremor Worm's pit at the bottom center of the map. Then, hit the button on the platform above to call the worm to "feed". Do this a total of times, then finish the match.
This can be done solo by playing in split screen mode with a controller. Begin a custom match with the bots set to 0% difficulty then add both characters in. If playing both, control Skree. It does not matter if Coco gets kills, as long as you win. Move Coco occasionally so she does not time out. Clear a single lane and killing every enemy that enters it. Take down turrets using Coco because of her increased damage to structures.
You need to have fifteen kills combined from all teammates without any of them dying. Play a bot match set to with 0% bot skill.