Pixel Pass is a task and reward system feature.
There you can complete different daily tasks and elite challenges. By completing them, you get a number of Battle Crowns, which can be used to level up and give possibilities to accumulate unique rewards.
When you reach the maximum tier (70 level), each time you fulfil the number of the Battle Crowns, you will be awarded a Mythical Skins Chest. The Chest can be obtained an unlimited amount of times.
Pixel Pass Tickets are the currency used in Pixel Pass. They can be used to unlock Pixel Pass levels, purchase Chests, and enhance your Pixel Pass by buying event bundles. Pass Tickets can be obtained as Pixel Pass level rewards or through an in-game purchase.