|Universe||Super Smash Bros.|
An Assist Trophy is an item that, when grabbed, summons a random Nintendo character out of 27 choices of various origin to quickly aid the holder, though there are currently two third-party Assist Trophies. Assist Trophies work nearly identical to Poké Balls. However, no Pokémon come out of them, and once an Assist Trophy is grabbed, it is automatically activated, assuming the holder is standing on the ground, and not in a jump, attack, or hitstun. Some Assist Trophies must be unlocked in order to be used, such as Isaac from Golden Sun. Unlike the Poké Ball, this can be eaten.
Only one Assist Trophy (and the character it releases) can be in a match at once. The next Assist Trophy will not appear until the data for the character it will release is fully loaded.
 List of Assist Trophies
|Assist Trophy||Relative frequency||Description||Unlock criteria|
|Andross||30||Andross (as he appears in the original Star Fox) appears in the background and shoots tiles at the players.|
|Barbara||30||Barbara strums on her guitar, creating damaging soundwaves, similar to Konga Beat, but with less range and duration.||Obtain 25 songs|
|Devil||30||Devil moves the stage boundaries, causing the blast lines to move as well, leading to the possibility of easier KOs.|
|Dr. Wright||30||Doctor Wright summons buildings to rise up out of the ground. This damages opponents who are standing in the area of the building, and produces great vertical knockback. Occasionally makes a massive skyscraper.|
|Excitebikes||30||Excitebike racers ride around the stage, causing damage to those they collide with. Some of them, if on a stage with an edge, will go back and forth until their time runs out.|
|Gray Fox||30||Frank Jaeger, the Gray Fox, runs around slashing opponents. Also reflects stray projectiles.||Unlocked with Snake|
|Hammer Bro||30||Hammer Bro throws hammers at opponents.|
|Helirin||12||Helirin floats around the stage while rotating, acting as a wall.|
|Infantry and Tanks||30||The Advance Wars infantrymen and tank sprites roam across the stage shooting at players. When spawning, they follow the direction of the summoner.||Play 300 Brawls|
|Isaac||24||Isaac pushes opponents off the stage by using a skill called Move, represented by giant magic hands. Its fixed knockback makes it easy to get trapped in.||Play 200 Brawls|
|Jill||24||Jill attacks opponents with her drill.|
|Jeff||24||Jeff Andonuts shoots 5 homing rockets from his Multi Bottle Rocket 5 invention (4 small & 1 large) at his opponents.|
|Kat & Ana||30||Kat and Ana fly in different directions slashing at anybody in front of them, but always cross in the same spot.|
|Knuckle Joe||30||Knuckle Joe delivers a series of Vulcan Jabs to his opponents and finishes with either a Smash Punch or an uppercut attack named Rising Break.|
|Lakitu and Spinies||30||Lakitu drops Spinies onto the field. The Spinies will meteor smash when falling from Lakitu. Upon landing, the Spinies walk around giving damage to opponents. Lakitu can be knocked off the screen or killed.|
|Little Mac||30||Little Mac runs around punching opponents.|
|Lyn||30||The screen darkens, as Lyn focuses and then, having teleported, she delivers a single, powerful strike focused on the nearest opponent, similar to Galaxia Darkness in animation and knockback.|
|Metroid||30||A Metroid latches onto players and gives them damage. Can be attacked and shaken off, but prevents the victim from using recovery moves. However if done right, the character can spam recovery moves indefinitely until the metroid disappears.|
|Mr. Resetti||18||Mr. Resetti gives speeches about different topics. If attacked, he causes an explosion.|
|Nintendog||18||A "Nintendog" (Labrador Retriever) blocks the screen.|
|Ray MK III||30||Ray MK III flies around the stage shooting missiles and green energy bullets.||Play 100 Brawls|
|Samurai Goroh||30||Samurai Goroh slashes his swords while chasing opponents.|
|Saki Amamiya||30||Saki Amamiya slashes and fires with his Dolphin Gun.|
|Shadow the Hedgehog||30||Shadow slows down time with Chaos Control, similar to the Timer item, but with shorter duration and a more slowing effect. The summoner continues to move at normal speed.||Unlocked with Sonic|
|Starfy||40||Starfy spins, hurting players. Can be knocked off stage.|
|Tingle||30||Tingle randomly summons a variety of strange effects. It also takes longer for more Assist Trophies to spawn after his appearance than any other character.
|Waluigi||30||Waluigi repeatedly stomps players into the ground. This onslaught is followed by either a strong kick or a strike from his tennis racket.|
In addition to the above characters, scrapped Assist Trophy data for Ridley was found when hacking Super Smash Bros. Brawl. Attendants at the 2007 Whobby Game Festival claimed to have seen Assist Trophies of Duster, Muddy Mole, and Rosalina, but there is no evidence of any of these in the game's final release.
 Description from the Super Smash Bros. Brawl instruction booklet
Spawns a character to help you.
 Trophy Description
A capsule that contains characters who will help you out in battle. You won't know who's in the capsule until you open it. It may be someone everyone knows or someone who's a bit of a mystery. The majority of these characters are invulnerable, so attacking them is not an option. You know what that means, right? RUN!
- Hammer Bro. is the only Assist Trophy character to appear as an enemy in the Subspace Emissary.
- In Classic Mode, if the character who summoned an assist trophy dies, the assist trophy goes away. However, this does not happen in All-Star mode.
- In the Gamecube preview issue of Electronic Gaming Monthly, the Smash Bros Melee article comments that Nintendo originally tried to implement Assist Trophies in Melee. The only trophy concept they gave details on was one that would release the ducks from Duck Hunt to fly around the stage and interfere with the fighters.
- Mario is the only universe to have more than one Assist Trophy.
Items in Super Smash Bros. Brawl
|Normal||Assist Trophy · Banana Peel · Beam Sword · Blast Box · Bob-omb · Bumper · Bunny Hood · Cracker Launcher · Deku Nut · Dragoon · Fan · Fire Flower · Food · Franklin Badge · Freezie · Golden Hammer · Gooey Bomb · Green Shell · Hammer · Heart Container · Home-Run Bat · Hothead · Lightning Bolt · Lip's Stick · Maxim Tomato · Metal Box · Motion-Sensor Bomb · Mr. Saturn · Pitfall · Poison Mushroom · Poké Ball · Ray Gun · Screw Attack · Smart Bomb · Smash Ball · Smoke Ball · Soccer Ball · Spring · Star Rod · Starman · Super Mushroom · Super Scope · Superspicy Curry · Team Healer · Timer · Unira · Warp Star|
|Containers||Barrel · Capsule · Crate · Party Ball · Sandbag · Rolling Crates|
|Key · Stock Ball · Trophy Stand|
|Collectibles||CD · Coins · Sticker · Trophy|
|Other||Smash Coins and Bills|
Characters that appear as Assist Trophies
|Andross · Barbara · Devil · Dr. Wright · Excitebikes · Gray Fox · Hammer Bro · Helirin · Infantry & Tanks · Isaac · Jeff · Jill · Kat & Ana · Knuckle Joe · Lakitu and Spinies · Little Mac · Lyn · Metroid · Mr. Resetti · Nintendog · Ray MK III · Saki · Samurai Goroh · Shadow · Starfy · Tingle · Waluigi|
Super Smash Bros. universe
|Fighting Polygon Team · Fighting Wire Frames · Fighting Alloy Team · Giga Bowser · Sandbag|
|Master Hand · Crazy Hand · Galleom · Duon · Tabuu|
|Stages||SSB: Battlefield · Final Destination|
SSBM: Battlefield · Final Destination
SSBB: Battlefield · Final Destination
|Items||Barrel · Beam Sword · Capsule · Crate · Fan · Home-Run Bat · Motion-Sensor Bomb · Ray Gun|
SSB: Bumper · Egg
SSBM: Egg · Flipper · Food · Party Ball
SSBB: Assist Trophy · Bumper · Cracker Launcher · Food · Gooey Bomb · Party Ball · Sandbag · Rolling Crate · Smash Ball · Smoke Ball · Team Healer
|Trophies||in Melee · in Brawl · in Brawl (SSE)|
|Music||Super Smash Bros. Brawl series · Super Smash Bros. series in Brawl|