Super Smash Bros. Ultimate Update Ver. 4.0.0 - Fighter Adjustments
| Fighter | Move | Change |
| Common for All Fighters Using Shields (Link, Young Link, Toon Link, Hero) | Basic Movements | Characters who carry shields can now shieldstun shuffle when blocking a projectile with their shield. |
| All Fighters | FS Meter | Once the FS Meter is fully charged, the Final Smash must be used within 20 seconds or the FS Meter will reset. Note: This change will not affect Spirits mode. |
| All Fighters | -- | The max combo count in Training will stop counting when the opponent can move. |
| All Fighters | Item Attack | Shortened the distance opponents can hitstun shuffle when attacked by the Daybreak item. |
| All Fighters | Item Attack | A fighter on the ground will now be launched after one hit from the Thwomp assist trophy. |
| Mario | Basic Movements | Adjusted the vulnerability when waking up from sleep to match other fighters. |
| Donkey Kong | Basic Movements | Adjusted the vulnerability when waking up from sleep to match other fighters. |
| Link | Basic Movements | Adjusted the vulnerability when waking up from sleep to match other fighters. |
| Link | Up Special | Shortened launch distance when the full combo doesn't connect. |
| Samus | Basic Movements | Adjusted the vulnerability when waking up from sleep to match other fighters. |
| Samus | Up Smash Attack | Shortened launch distance when the full combo doesn't connect. |
| Dark Samus | Up Smash Attack | Shortened launch distance when the full combo doesn't connect. |
| Yoshi | Side Smash Attack | Reduced the range opponents will be pushed while charging. |
| Fox | Basic Movements | Adjusted the vulnerability when waking up from sleep to match other fighters. |
| Peach | Neutral Special | When blocking an attack from the rear, Toad’s counterattack will hit opponents more easily. |
| Peach | Up Special | Shortened launch distance when the full combo doesn't connect. |
| Daisy | Neutral Special | When blocking an attack from the rear, Toad’s counterattack will hit opponents more easily. |
| Daisy | Up Special | Shortened launch distance when the full combo doesn't connect. |
| Bowser | Down Air Attack | Immediately descend when using the attack after being launched. |
| Sheik | Down Air Attack | Immediately descend when using the attack after being launched. |
| Mewtwo | Basic Movements | Reduced the area of the tail that can take damage. |
| Mewtwo | Up Smash Attack | Increased the amount of time hit detection lasts. Extended launch distance. |
| Mewtwo | Down Smash Attack | Reduced vulnerability. |
| Mewtwo | Backward Throw | Increased power. |
| Mewtwo | Side Special | Increased attack speed. Increased the speed to reflect projectiles. |
| Mr. Game & Watch | Down Air Attack | Immediately descend when using the attack after being launched. |
| Pit | Neutral Attack 1 | Increased attack speed. |
| Pit | Up Tilt Attack | Reduced vulnerability. |
| Pit | Down Smash Attack | Extended launch distance when hit with the first attack. |
| Pit | Back Air Attack | Reduced vulnerability when landing after using the move. |
| Pit | Down Air Attack | Extended launch distance when hitting an opponent in the air with a meteor effect. |
| Dark Pit | Neutral Attack 1 | Increased attack speed. |
| Dark Pit | Up Tilt Attack | Reduced vulnerability. |
| Dark Pit | Down Smash Attack | Extended launch distance when hit with the first attack. |
| Dark Pit | Back Air Attack | Reduced vulnerability when landing after using the move. |
| Dark Pit | Down Air Attack | Extended launch distance when hitting an opponent in the air with a meteor effect. |
| Zero Suit Samus | Down Air Attack | Immediately descend when using the attack after being launched. |
| Snake | Basic Movements | Adjusted the vulnerability when waking up from sleep to match other fighters. |
| Pokémon Trainer | Other | The invincibility time for grabbing edges is no longer shortened when performing a Pokémon Change in the air and then grabbing an edge. |
| Ivysaur | Down Air Attack | Reduced the range of the strong launching attack. Shortened the launch distance when the weak launching attack hits. |
| Ivysaur | Side Special | Reduced attack speed and increased vulnerability. |
| Ivysaur | Up Special | Shortened launch distance for the high-damage range when using the attack in the air. |
| Charizard | Side Tilt Attack | Extended launch distance when hit in the high-damage range. |
| Charizard | Side Smash Attack | Increased power. Extended launch distance. |
| Charizard | Up Smash Attack | Shortened launch distance when the full combo doesn't connect. |
| Charizard | Neutral Air Attack | Increased the amount of time hit detection lasts. Reduced vulnerability when landing after using the move. |
| Charizard | Forward Throw | Extended launch distance. |
| Charizard | Side Special | Increased the speed of the edge-grab timing. |
| Lucas | Dash Attack | Increased the amount of time hit detection lasts. |
| Lucas | Side Tilt Attack | Increased the range at the beginning of the move. Extended launch distance when hit in the high-damage range. |
| Lucas | Up Smash Attack | Extended the invincibility time at the start of the move. |
| Lucas | Up Air Attack | Reduced vulnerability. |
| Lucas | Side Special | Reduced vulnerability when landing after using the move. |
| Sonic | Down Air Attack | Immediately descend when using the attack after being launched. |
| Olimar | Side Smash Attack | Increased the distance for Purple Pikmin. Increased the amount of time hit detection lasts for Purple Pikmin. |
| R.O.B. | Neutral Attack 1 | Reduced the amount of time opponents will be in the damage animation when hit with the tip’s attack range. |
| Toon Link | Down Air Attack | Immediately descend when using the attack after being launched. |
| Villager | Up Smash Attack | Made it easier to hit multiple times. |
| Rosalina & Luma | Basic Movements | Rosalina can be more easily grabbed from the front when walking, crouching, and shielding when Luma is following. |
| Rosalina & Luma | Neutral Attack 1 | Luma will be in front when reversing the attack. |
| Rosalina & Luma | Side Smash Attack | Luma will be in front when reversing the attack. |
| Rosalina & Luma | Up Smash Attack | Luma will be in front when reversing the attack. |
| Greninja | Down Air Attack | Immediately descend when using the attack after being launched. |
| Little Mac | Neutral Attack 3 | Depending on the timing of continuing from neutral attack 2 to neutral attack 3, neutral attack 3 will no longer decrease vulnerability. |
| Mii Brawler | Basic Movements | Reverted falling speed to match version 3.0.0. |
| Mii Brawler | Neutral Special 2 | Increased attack speed. Extended launch distance. |
| Mii Brawler | Up Special 1 | Extended launch distance. |
| Mii Swordfighter | Neutral Special 3 | Made it easier to hit multiple times. |
| Mii Gunner | Up Smash Attack | Made it easier to hit multiple times. Shortened launch distance when the full combo doesn't connect. |
| PAC-MAN | Neutral Special | Will no longer drop the Bonus Fruit while charging the neutral special even if flipped left or right with attacks like Mario’s side special. |
| Ryu | Basic Movements | The attack after a perfect shield will be unleashed after facing the opponent. |
| Ken | Basic Movements | The attack after a perfect shield will be unleashed after facing the opponent. |
| Corrin | Side Smash Attack | Extended launch distance. |
| Corrin | Down Air Attack | Immediately descend when using the attack after being launched. |
| Corrin | Side Special | Reduced vulnerability when jumping after stabbing the ground. |
| Corrin | Up Special | Extended vertical and horizontal distance. |
| Bayonetta | Down Air Attack | Immediately descend when using the attack after being launched. |
| Ridley | Up Smash Attack | Increased the amount of time hit detection lasts. Extended launch distance. |
| Ridley | Back Air Attack | Increased power. |
| Ridley | Up Air Attack | Increased the high-damage range. Made it easier to hit the high-damage range. |
| Ridley | Dash Attack | Increased attack range. |
| Ridley | Side Special | Reduced vulnerability when jumping after grabbing an opponent. Extended launch distance when throwing an opponent at the edge. |
| Ridley | Up Special | Increased attack speed. Increased movement speed. |
| Simon | Down Air Attack | Immediately descend when using the attack after being launched. |
| Richter | Down Air Attack | Immediately descend when using the attack after being launched. |
| Isabelle | Basic Movements | Extended distance of forward and backward dodging. |
| Isabelle | Neutral Attack 1 | Made it easier to hit multiple times. |
| Isabelle | Up Smash Attack | Extended launch distance. |
| Isabelle | Side Special | Extended launch distance of upward throws. Increased the speed of the grab detection. |
| Isabelle | Down Special | Increased attack speed of the Lloid attack. |
| Piranha Plant | Dash Attack | Adjusted launch angle. |
| Piranha Plant | Up Tilt Attack | Reduced vulnerability. |
| Piranha Plant | Side Special | Capped the attack power increase when repeatedly reflected. Increased attack speed. Increased the amount of time hit detection lasts. |
| Piranha Plant | Down Special | Reduced vulnerability. Increased the power against shields. Shortened the charge time until reaching max charge. |
| Joker | Down Special | While Arsene is summoned, projectiles that deal 50% or more damage cannot be reflected. |