Powers up the moves of all allied sync pairs by 10%. Reduces attack move damage taken by all allied sync pairs by 20%. The more allied sync pairs with the Fighting theme you have on your team, the higher these percentages are. (Each additional sync pair powers up moves by 10% and reduces damage by 3%. The maximum power-up is 30%, and the maximum damage reduction is 26%.)
The user and its allies' moves are powered up by 10%, and attack move damage taken by the team's sync pairs is reduced by 20%. Each additional allied sync pair with the Fightingtheme skill powers up moves by a further 10%, for a maximum power increase of 30%. Each additional allied sync pair with the Fighting theme skill also reduces attack move damage taken by 3%, for a maximum damage reduction of 26%. Fist Myth does not affect sync moves or max moves.