An update is now available for Mario + Rabbids: Sparks of Hope, and it fixes a bunch of things, including a bug that prevented 100% completion in some instances. You can read more about that bug here, and you can find the full patch notes below.
Fixed several progression issues that would prevent 100% completion of the game Fixed an issue where the game would crash if the Final Boss tried to throw a summoned creature or Rabbid Mechakoopa Fixed a few text issues in localized versions of the game Fixed a few issues where heroes would get stuck or move out of bounds General optimization to increase framerates and ensure smooth gameplay
QUALITY OF LIFE UPDATES
The game will now warn players if they have an empty Spark Slot before a battle The Spark Skill Tree branch will now tease players to go find the Giant Enemies Spark Quests have been made easier to discover in the quest log, and with an icon in the travel map The battle level is now displayed both in the Beep-0 tacticam and battle menu Battle objectives will now be more evident when the battle map is introduced Difficulty level differences have been made more apparent Improved visibility of roaming enemies off-screen that threaten the heroes The specific duo Darkmess puddles, that reward weapon skins to individual heroes, will now display icons of the heroes required for the battle