Off the Ground (OTG) attacks play a large role in Ultimate Marvel vs Capcom 3. This refers to the ability to hit an opponent while they are down on the ground, before they being their recovery animation. In this later installment of the game every character has been given at least one attack that has OTG properties which allows a greater freedom in team match-ups and increases the length of combos. Below is a list of each character's OTG attack.
Command
Damage
Name
Akuma
+ 
-> 
90,000
Hyakki Gojin
Akuma
air 
+ + -> hold 
+ + -> hold 18,000 X 25
Messatsu-Gohado Ungyo
Amaterasu
air 
+
+ 90,000
Thunder Edge Stab
Amaterasu
+ + 70,000 + variable
Okami Shuffle
Arthur
air 
65,000
Jumping Special
Arthur
+ 
40,000 + 20,000 X 5
Fire Bottle Toss
Arthur
+ + 400,000
For the Princess
C. Viper
+ 80,000
Seismic Hammer
C. Viper
+ 50,000 X 3
EXSeismic Hammer
C. Viper
+ + 70,000 + 30,000 X 3 + 150,000
Burst Time
Captain America
+ , 
60,000 X 2
Shield Slash
Chris
+ 90,000
Crouching Heavy
Chris
+ 90,000
LowShot
Chris
air + (or )
+ (or ) 22,000 X 8
Air Gun Fire
Chris
+ + 100,000 X 4
Grenade Launcher
Chris
+ + 70,000 + 30,000 X 3 + 150,000
SweepCombo
Chris
+ + 16,500 X 27
Satellite Laser
Chun-Li
air +
+ 65,000
Yosokyaku
Dante
+ 25,000 X 2~4
Cold Shower
Dante
+ -> 25,000 X 5
Acid Rain
Dante
+ 35,000 X 4
Crystal
Dante
+ -> 130,000
Million Carats
Dante
+ 15,000 X 10
Twister
Dante
+ 100,000
Volcano
Dante
+ 20,000 X 8
Thunder Bolt
Deadpool
+ 70,000
Katana-Rama!
Deadpool
air +
+ 70,000
Trigger Happy
Doctor Doom
40,000 X 2
Standing Medium
Doctor Doom
55,000 X 2
Standing Heavy
Doctor Doom
+ 20,000 x 1~8
Hidden Missles
Doctor Doom
+ 20,000 X 4~12
Plasma Beam
Doctor Doom
+ + 20,000 X 25~50
Photon Array
Doctor Strange
+ -> + 90,000
Flames of the Faltine
Doctor Strange
+ + 33,000 x 10
Spell of Vishanti
Dormammu
+ 20,000 x 5
Flame Carpet
Dormammu
+ 35,000 X 4
Purification
Dormammu
+ (after dark spells) variable
Liberation
Dormammu
+ + 400,000
Dark Dimension
Felicia
+ 50,000
Toy Touch
Firebrand
+ 100,000 X 15,000 per Flame
Hell Spitfire
Firebrand
+ + 23,000 per Hit
Dark Fire
Frank West
+ 80,000~150,000
Tools of Survival
Frank West
+ 10,000
Snapshot
Frank West
+ (lv 2) 70,000
Roundhouse Kick
Frank West
+ + 30,000 x 8 + 70,000
Blue Light Special
Ghost Rider
+ 35,000 per Hit
Heartless Spire
Ghost Rider
+ 20,000 per Hit
Hellfire
Ghost Rider
+ + 20,000 x 11
Spirit of Vegeance
Haggar
+ 97,000
Crouching Heavy
Haggar
+ + 30,000 X 7 + 200,000
Giant Haggar Press
Hawkeye
+ -> 50,000 - 80,000
TrickShot
Hawkeye
+ 25,000 per Arrow (up to 10)
RagtimeShot (Kamikaze)
Hawkeye
+ + 50,000 per Arrow (up to 7)
Kiss of Fire
Hawkeye
+ + 430,000
Tag Team Special
Hsien-Ko
+ 80,000
Anki Hou: Bomb
Hsien-Ko
+ + 60,000 X 6
Chireitou
Hsien-Ko
+ + 50,000 + 35,000 X 8~16
Tenrai Ha
Hulk
charge , +
, + 40,000 X 4
Gamma Wave
Hulk
+ 80,000 X 4
Gamma Tsunami
Iron Fist
, 85,000
Crescent Heel
Iron Man
+ 66,500~116,900
Smart Bomb
Jill
+ 98,000
Fallen Prey
Jill
+ + 303,100
Machine Gun Spray
Magneto
+ + 70,000 X 6
Magnetic Shockwave
Magneto
+ + atk 400,000 + 1,000 per button mashed
Gravity Squeeze
MODOK
+ 20,000 X 5
Crouching Medium
Morrigan
+ + 60,000 X 5
Shadow Servant
Nemesis
+ + 80,000 x 3 + 80,000
Bioweapon Assault
Nova
+ 100,000
Nova Slam
Nova
+ 90,000
Centurion Rush
Phoenix
air + (or )
+ (or ) 20,000 + 67,000
TKShot
Phoenix Wright
+ (or ) (Investigation) 68,000
M-Maya!?
Phoenix Wright
+ + (Trial/Turnabout) 250,000
Order in the Court!
Phoenix Wright
+ + (Turnabout) 500,000
Ace Attorney
Rocket Raccoon
+ 40,000
Spitfire
Rocket Raccoon
-> 70,000
Oil Bomb
Rocket Raccoon
70,000
Mr. Flapper
Rocket Raccoon
+ atl + 220,000
Mad Hopper
Rocket Raccoon
+ + 370,000
Rocky Raccoon
Ryu
air + + ->
+ + -> 18,000 X 25~50
Air Shinku Hadoken
Sentinel
+ 150,000
Rocket Punch
She Hulk
, , -> -> 80,000
Chariot into Torpedo
She Hulk
air +
+ 100,000
Senton
Shuma Gorath
charge , 
+
, + 20,000 X 10
Mystic Ray
Shuma Gorath
+ + 15,000 per hit (random hits)
Hyper Mystic Smash
Shuma Gorath
+ + 25,000 X 20
Hyper Mystic Ray
Spencer
air + (or )
+ (or ) 30,000 + 100,000
Air Wire Grapple
Spencer
air +
+ 70,000 + 80,000
Bionic Bomber
Spider-Man
air + +
+ + 20,000
Web Glide
Storm
+ 30,000 X 6
Double Typhoon
Storm
+ + 13,000 X 35
Hail Storm
Storm
+ + 30,000 + 15,000 X 13 + 120,000
Elemental Rage
Strider
+ 55,000
Slide
Strider
+ 90,000
FormationC
Strider
+ -> + 90,000
FormationB
Strider
+ + 25,000 per Hit
Legion
Super-Skrull
90,000
Standing Heavy
Super-Skrull
+ 80,000
Crouching Heavy
Super-Skrull
, + 30,000 X 3
Worm Squash
Super-Skrull
air +
+ 70,000 + 50,000
Brutal Pile Bunker
Super-Skrull
+ 80,000 + 50,000
Metero Smash
Super-Skrull
+ + 450,000 over 13 hits
Death Penalty
Taskmaster
air + (or )
+ (or ) 50,000 X 1~3
Aim Master
Taskmaster
air + +
+ + 20,000 X 25
Air Legion Arrow
Thor
+ 70,000 + 100,000 + 20,000 X 3
Mighty Smash
Thor
dp + +
+ 130,000 per hit (max 4 hits)
Mighty Thunder
Trish
air + +
+ + 15,000 x 30~60
Maximum Voltage
Tron Bonne
+ 30,000 X 4
Crouching Heavy
Vergil
+ 100,000
HighTime
Vergil
+ + (Devil Trigger) 610,000
Dark Angel
Viewtiful Joe
+ 70,000
Voomerang
Viewtiful Joe
air + +
+ + 250,000
Desperado
Wesker
+ 80,000
Samurai Edge
Wolverine
+ 70,000
Sliding Claw
X-23
+ hold 135,400
Charged Ankle Slice
Zero
air + (or )
+ (or ) 70,000~80,000
Sentsuizan
Zero
+ + 15,000 X 30
Rekkoha