Combat Mechanics are the fundamental rules that govern all combat in 
Blox Fruits: damage calculation, scaling, reduction, amplification, and interactions between players, enemies, weapons, and abilities.
Damage
The system covers three aspects: base damage calculation, damage reduction, and damage amplification. The source page on the English wiki is still under construction: exact formulas are not detailed there yet.
PvP Mechanics
Some mechanics are exclusive to PvP, particularly around 
Levels and the 
Bounty/Honor system. Here too, the source page remains to be completed.
Blox Fruits "Stock"
Blue Gear
Blue Moon
Boats
Books
Bosses
Brazil World
Chess
Chests
Codes
Combat Mechanics
Combos
Commands
Common
Consumables
Crew
Cursed Chest
Damage Counter
Dashing
Destructible Physics
DLC
Dragon Tether
Easter Eggs