User can stack any/all different effects, powers and abilities on themselves, others, weapons and items either to increase their overall effectiveness or grant entirely new powers from the stacked effect. Unlike Power Augmentation the users are actually stacking the power or effect itself instead of merely doubling its power, this power can increase all parameters of any ability, power or effect such as range, strength, penetration, radius, targeting, duration, etc.
Stacked powers may overload if stacked too many times.
Powers may be limited to a certain number of stacks.
Goku (Dragon Ball series)
Fused Zamasu (Dragon Ball Super)
Yuri (Final Fantasy: Crystal Chronicles)
Ramza Lugaria (Final Fantasy Tactics)
Samus Aran (Metroid)
Sasuke Uchiha (Naruto)
Naruto Uzumaki (Naruto)
Kakashi Hatake (Naruto)
Users of One for All (My Hero Academia)
Ratchet (Ratchet & Clank series); via weapon mods
Space Ghost (Space Ghost)
Ryu (Street Fighter series)
Ken (Street Fighter series)
Yusuke Urameshi (Yu Yu Hakusho)
Using the Kaio-ken Kamehameha, Goku (Dragon Ball series) stacks the power-boosting effects of the Kaio-ken onto his Kamehameha, enhancing the beam's strength.
Goku (Dragon Ball series) stacking the Kaio-ken and his Super Saiyan Blue form.
Fused Zamasu (Dragon Ball Super) creates his Barrier of Light by combining and stacking both sources of his power.
Yuri (Final Fantasy: Crystal Chronicles) can stack the effects of his spells not only to increase their range and power, but also generate entirely new spells from stacking.
Along with the Shikon Jewel shards to empower his Banryū, Bankotsu (InuYahsa) also made a wish on the halberd to grant it demonic powers should he kill 1000 humans and 1000 demons.
Samus Aran (Metroid) is able to stack the effects of her various beam weapons.
All for One (My Hero Academia) is an ability theft based Quirk that allows its user to steal and stockpile countless Quirks, combining them in various different ways, such as combining Muscle Coiling with Air Pressure and numerous attack power/strength augmentation abilities to magnify its destructive capacity.
Using the Kagutsuchi Chidori, Sasuke Uchiha (Naruto) stacks the black flames of Kagutsuchi with the electricity of Chidori.
When in the Six Paths Sage Mode, Naruto Uzamaki (Naruto) can stack the power of his Rasenshuriken with the specialchakrapropertiesoftheninetailedbeasts, allowing him to create his Sage Art: Super Tailed Beast Rasenshuriken.
Using the Kamui Lightning Cutter, Kakashi Hatake (Naruto) stacks the space-time properties of Kamui onto his Lightning Cutter.
Ratchet's (Ratchet and Clank series) OmniWrench 10K can modded with the Fire-Bomb wrench mod, Shock Crystal wrench mod, Wild Burst wrench mod, or Triple Wave wrench mod in order increase its power.
During his time in working for MegaCorp, Ratchet was able to to purchase illegal weapon mods for most of his weapons from Slim Cognito, allowing them shock enemies with the shock mods or burn them with acid mods, adding to their already incredible power.
When Ratchet was kidnapped to be a gladiator in Dread Zone, he was able to outfit his weapons with Alpha mods to boost he weapon's speed, knock-back, damage, range, ammo, blast-range, jackpot, and nano-boost, and Omega mods shock, brainwash, napalm, freeze, morph, infect, time-bomb, and mini-bomb effects.
By pressing different button combinations on his Power Bands, Space Ghost (Space Ghost) can stack his various different beams.
Ryu (Street Fighter series) is able to stack the effects of his electricity ki manifestation with the multi-hitting effects of Shinku Hadoken to create his Denjin Haoken, allowing it to hit enemies up to eight times while also eletrocuting them.
Ken's (Street Fighter series) can manifest his ki in the form of fire and use it to attack with his devastatingly powerful, flaming version of the Shoryuken, the Shinryuken. The attack burns his opponents while also creating a vacuum effect to keep its opponents in range and strike them multiple times.