Main Power Up

Main Power Up is an ability in Splatoon 2 added in the update.

The ability appears in both primary and secondary gear slots, and will have different effects on each main weapon, even inside the same weapon class.

All gear previously available in the shops that had are now available with Main Power Up.

Known effects
The effects of Main Power Up are displayed on the Equipment screen on the info tab for the abilities for the currently selected main weapon. The benefits from Main Power Up will vary from weapon to weapon. Weapons which acquire increased damage are incapable of decreasing the number of hits required to splat an undamaged opponent, but the damage total for each hit will be slightly increased.

Shooter

 * - Increases shot accuracy when firing while jumping.
 * - Increases damage up to 25%.
 * - Increases ink coverage.
 * - Increases shot accuracy when firing while jumping.
 * - Increases shot accuracy when firing while jumping.
 * - Increases damage up to 25%.
 * - Slightly increases range and increases accuracy while on the ground.
 * - Increases damage up to 30%.
 * - Increases high-damage radius of explosions.
 * - Increases ink coverage.
 * - Increases shot accuracy when firing while jumping.
 * - Increases shot accuracy when firing while jumping and increase the radius of explosion.
 * - Increases shot accuracy when firing while jumping and increase the radius of explosion.
 * - Increases damage up to 25%.
 * - Increases shot accuracy when firing while jumping.
 * - Increases ink coverage.
 * - Increases damage up to 25%.
 * - Increases damage up to 30%.
 * - Increases damage up to 30% while tapping, and 20% while holding.

Roller

 * - Increases damage.
 * - Increases damage.
 * - Increases damage.
 * - Slightly increases movement speed and ink coverage while inking.
 * - Slightly increases movement speed and ink coverage while inking.
 * - Increases damage.

Charger

 * - Increases damage.
 * - Slightly increases range and increases ink coverage.
 * - Slightly increases range and increases ink coverage.
 * - Slightly increases range and increases ink coverage.
 * - Increases damage.
 * - Increases damage.
 * - Increases damage.

Slosher

 * - Increases ink coverage.
 * - Increases ink coverage.
 * - Increase damage from higher grounds.
 * - Increases ink coverage.
 * - Increases ink coverage.

Splatling

 * - Increases damage.
 * - Increases duration of firing in a burst.
 * - Increases damage.
 * - Increases duration of firing in a burst.
 * - Increases duration of firing in a burst.

Dualie

 * - Increases damage up to 20%.
 * - Increases damage up to 20%.
 * - Increases damage up to 20%.
 * - Increases damage up to 20%.
 * - Increases damage up to 16%.

Brella

 * - Speeds up Brella canopy regeneration.
 * - Increases Brella canopy durability.
 * - Speeds up Brella canopy regeneration.

Gear
Main Power Up is the main ability of:

Calculating damage
A = ability points = 10 × [Main Power Up main slots] + 3 × [Main Power Up sub slots] B = (3.3 * A - 0.027 * A^2) / 100 C = (mid - min) / (max - min) D = min⁡ + ( max - min ) * lerpN(B, C) result = [base value] * D

,, and   can be found from the game's parameters.

lerpN is an interpolation function where: If C = 0.5 then lerpN(B, C) = B If B = 0.0 then lerpN(B, C) = B If B = 1.0 then lerpN(B, C) = B If C ≠ 0.5 then lerpN(B, C) = e^(-(ln⁡(B) × ln⁡(C)) / ln⁡(2))

For example: Splat Dualies with two primary Main Power Up slots and one secondary Main Power Up slot. Given: main slots = 2 sub slots = 1 min = 1.0 mid = 1.06 max = 1.16 base damage = 30

A = 10 × 2 + 3 × 1 = 23 B = (3.3 * 23 - 0.027 * 23^2) / 100 = 0.503985906 C = (1.06 - 1) / (1.16 - 1) = 0.375 C ≠ 0.5, so lerpN(B, C) = e^(-(ln⁡(B) × ln⁡(C)) / ln⁡(2)) effect = 1 + ( 1.16 - 1 ) * e^(-(ln⁡(0.503985906) × ln⁡(0.375)) / ln⁡(2)) = 1.080637745 result = 30 * 1.080637745 = 32.41913235 This would appear as 32.4 damage in-game.

Damage cap
After the damage cap is reached, adding more Main Power Up will not increase maximum weapon damage. It will continue to increase falloff damage. For example, even if a Splattershot Pro reaches 49.9 damage on direct hits within effective range, the lower-damage hits that occur out of effective range will still continue to be boosted by using more Main Power Up.

Trivia

 * Main Power Up is one of first two abilities to be added to the game post-release. It however remains as the only truly unique ability, unlike Bomb Defense Up DX.