Each time Ultra Mechas evolves requires leveling up 10 levels and a certain quantity of materials. Please note that the Mecha Factory also needs to reach a certain level to complete the evolution.

Each evolution will get different evolution stats according to the quality of Ultra Mechas. The effect value of each evolution stat is different, and the max effect value also increases as Ultra Mechas evolve. Evolution stats and effect values are obtained randomly. If you are not satisfied with the stats or effect values, you can refresh them with reset items.

You can also lock evolution stats. A locked stat won't get its type changed (effect value may be changed) when it is refreshed. Locking one extra stat doubles the cost of reset items. For example: Locking an evolution stat once costs 2 items; Locking evolution stats twice costs 4 items; Locking evolution stats three times costs 8 items.

If you want to replace the evolution stats of an Ultra Mecha, you can go to the Shop to purchase the Ultra Mecha Evolution Reset item, which can regress your Ultra Mecha to common quality. All evolution stats will be cleared, allowing you to evolve the Ultra Mecha again and re-choose evolution stats. Please note that after using the Reset item, the mecha's evolution buff will be cleared, and you need to re-evolve the mecha. Please think twice before using the item.