Blox Fruits mastery not increasing? What to check

Check one fight before changing your setup

Test your setup on a single enemy you can easily defeat with the fruit or weapon you want to train. Use only that item for the entire fight so you know for sure which attack landed the final hit. The game's English text, Gamer Robot's FAQ, and the official 2x Mastery pass description all state the same rule: an item only earns mastery when it lands the finishing blow.

Check the mastery display on the equipped item itself rather than your character's main level bar. Character EXP and item mastery use separate counters. In a First Sea interface check, a new character showed level 1 with 0/86 EXP while Combat showed mastery 1 with 0/70 progress. Because those bars track different things, your character level bar cannot tell you whether your weapon or fruit gained mastery.

Look at the progress numbers toward the next mastery level, not just the main mastery level number. A single fight might add progress toward the next level without completing a full level-up. Checking the progress numbers tells you whether the reward went to the item.

1. Equip the item you want to train and write down its exact name, current mastery level, and progress toward the next level.
2. Defeat one manageable enemy using only that item so its attack clearly ends the fight.
3. Check the item's mastery progress again; if the progress numbers went up, the fight trained the right item.
4. If the progress did not change, verify that you checked the right item name and landed the final hit with it, then save your before-and-after details for the troubleshooting steps below.

Your stronger attack keeps getting the last hit

When a weak item is slow to kill enemies on its own, you can chip the enemy's health down with a stronger weapon first and swap to the weak item for the killing blow. For this handoff to work, the enemy must survive your strong attacks with enough health left for the target item to finish the job.

If you are trying to level a sword but your fruit attack accidentally kills the target before you swap, the fruit takes the mastery instead. Swap to your sword earlier in the fight, or practice on a weaker enemy that your sword can defeat outright. Switching to the sword after the enemy is already defeated will not transfer the credit.

Practice the swap timing on a single enemy until you see your target item's mastery bar go up after the kill, then repeat that rhythm.

Mastery dropped after you switched items

Every weapon, fighting style, and fruit tracks its own mastery independently. Gamer Robot's FAQ explains that any newly acquired item starts at Mastery 1, while the mastery you earned on previous gear stays saved and reappears when you equip that older item again.

For example, if you train one sword to Mastery 80 and then equip a brand-new sword, the new sword will display Mastery 1. Re-equip your first sword and check its name and mastery bar to verify that your 80 levels are still there.

With fruits, remember that saved mastery is separate from fruit ownership. The Dealer's purchase prompt warns that buying a new fruit replaces your current one, and only a Robux purchase grants permanent access to switch back through the shop. If you replace a non-permanent fruit, your mastery on it stays on record, but you cannot re-equip that fruit for free just because you leveled it earlier.

Mastery increased, but your move is still locked

Check the mastery requirement listed directly on the locked move for the item you are using. When a move is unavailable, the game displays a "Skill locked!" message along with the required mastery level. Mastery earned on a different fruit or weapon is tracked separately and does not count toward this item's moves.

If the move requires a higher mastery level than you currently have on this item, keep landing finishing blows with it until you reach that number. Always check the target level on the specific item you are holding, because using a requirement from a different fruit or weapon can give you the wrong goal.

If your item's displayed mastery already meets the listed level, check the move for any additional condition. Gamer Robot's general mastery FAQ does not list every special unlock rule, so you need to inspect the specific move's requirements directly.

Will 2x Mastery fix the problem?

The official 2x Mastery game pass doubles the mastery points you receive from a kill, but its store description still requires you to finish enemies with the item you want to level. Owning the pass will not award mastery to an item that did not land the final hit.

Make sure you can raise your target item's mastery bar in a normal fight before spending Robux on the pass. If your stronger attack is accidentally killing enemies before you swap weapons, adjusting when you switch attacks is what will get your mastery moving.

A clean finishing blow still gives no progress

If you confirmed the item name, landed the finishing blow with it, and saw zero change in its mastery progress, the standard last-hit rule does not explain the problem. Take before-and-after screenshots showing the item name and its progress numbers, and write down which enemy you defeated and which attack ended the fight.

Use those recorded details to check current developer announcements or submit a bug report. If an item you already trained seems to have lost its progress, include before-and-after records of that exact item to show it is not just a newly acquired item starting at mastery 1.

Official developer descriptions and game text do not provide a self-service fix when a clean finishing blow gives no progress. Avoid replacing your fruit or buying a pass to fix this issue, as neither is a supported solution.