Goku: Kamehameha (horizontal beam. cannot be super dashed through. wallbounces on hit.)
Gohan: Dragon Flight (dp/anti-air. invul on startup.) https://gfycat.com/AgedDirectFlamingo
Vegeta: Air Ki Blast Rush (downward angled projectiles. can be super dashed through.)
Frieza: Earth Breaker (appears a set distance in front of Frieza, or directly in front if opponent is in corner. cannot be super dashed through. launches opponent on hit.) https://gfycat.com/SlowInbornImperialeagle
Cell: Air Kamehameha (downward angled beam. cannot be super dashed through. pops opponent up on hit) https://gfycat.com/PracticalTemptingDogfish
Majin Buu: Sweeping Breath (short range cloud projectile. pops opponent up on hit) https://gfycat.com/TidyConventionalAnaconda
Trunks: Change the Future (blows opponent back on hit. possibly negates “light” ki blasts (Goku 5S, Vegeta Ki Blast Rush,etc.). cannot be super dashed through. Very large hitbox.) https://gfycat.com/WeeCleverIggypops https://gfycat.com/disastrousbossyisopod
Piccolo: Homing Energy Orb (uncharged) (tracks opponent anywhere on screen. Negates “light” ki blasts. can be super dashed through.)https://gfycat.com/WelltodoDenseIsabellineshrike
Krillin: Senzu Bean (recovers ALL blue life. can be grabbed by opponent as well.)
Krillin’s assist operates on a rotation. He starts off with 3 Senzu Beans and after each bean he throws a rock instead. Senzu CANNOT be replenished during the match. Initial rotation is Bean -> 3x rock -> Bean. If he runs out of beans, he instead does a tracking ki blast (aka Hidden Missiles Jr.) https://gfycat.com/SelfishHeartyChameleon
Assist without any Senzu remaining https://gfycat.com/LeadingUnimportantKoala
Android 16: Hell Heat (short range blast. does not launch grounded opponents on hit.) https://gfycat.com/MeanShabbyEasternnewt
Android 18: Barrier (absorbs incoming attacks for the duration of the assist. *dramatic* meter gain depending on the attack(s) absorbed.) https://gfycat.com/YawningUnluckyCarp
SSB Goku: Divekick https://gfycat.com/DenseVeneratedAbyssiniancat
SSB Vegeta: Big Bang Attack (somewhat slow startup. charging animation has a hitbox as well. hitbox extends behind Vegeta a bit.) https://gfycat.com/WearyBogusGuanaco
Tenshinhan: Dodonpa (single hit horizontal beam. on hit, launches opponent instead of wallbouncing like other beams.) https://gfycat.com/FormalWelldocumentedBagworm
Yamcha: Wolf Fang Fist (dashes forward with a series of claw swipes. does not launch grounded opponents on hit.) https://gfycat.com/TastyGrippingDodobird
Nappa: Blazing Storm (explosion at opponent’s location, tracks the opponent up to a certain distance when Nappa first appears) https://gfycat.com/SpotlessFinishedGrayfox
Nappa attacking from further away https://gfycat.com/NegligibleSecondhandKronosaurus
Ginyu: Shoulder Tackle https://gfycat.com/QuerulousThunderousArieltoucan
Gotenks: Galactic Donuts (tracks opponent anywhere on screen. on hit, paralyzes opponent for considerable time.) https://gfycat.com/PassionateSilentAfricangroundhornbill
Kid Buu: Arm Ball (fires a projectile that travels forward a set distance. on contact, begins attacking the opponent, otherwise it does nothing. has considerable blockstun.) https://gfycat.com/CalculatingSimplisticHornbill
Adult Gohan: Dragon Flight (same as Young Gohan) https://gfycat.com/VengefulKindheartedBorzoi
Goku Black: Black Kamehameha (same properties as Goku’s Kamehameha) https://gfycat.com/ScratchyDapperEasternglasslizard
Beerus: Sphere of Destruction (2 hit attack; sphere summon -> kick. the sphere has an active hitbox the moment it appears.) https://gfycat.com/FluffySnivelingHorse
Hit: Dash Kick (pops opponent up slightly, appears to have some projectile invul) https://gfycat.com/PessimisticZealousCivet