Does Character Upgrade Ever Fail? 25 November 2024 08:15 Updated If you collect the desired amount of cards in the upgrade process, you can upgrade with a 100% chance of success. There is no possibility of failure. Related articles How Can I Add Features to My Characters? Will My Weapons be Permanent? Or Are They Temporary? How Can I Add Features to My Weapons? Can I Change My In-Game Set? How Do I Get The Characters?