OTG attacks play a large roll in Ultimate Marvel vs Capcom 3. In this later installment of the game every character has been given an attack that has OTG properties which allows a grater 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
rdp + atk -> m
90,000
Hyakki Gojin
Akuma
air qcf + atk + atk -> hold h
18,000 X 25
Messatsu-Gohado Ungyo
Amaterasu
air df + h
90,000
Thunder Edge Stab
Amaterasu
qcf + atk + atk
70,000 + variable
Okami Shuffle
Arthur
air s
Arthur
qcb + l
Arthur
qcf + atk + atk
C. Viper
C. Viper
C. Viper
Captain America
qcf + l , airok
60,000 X 2
Shield Slash
Chris
Chris
Chris
Chris
Chris
Chun-Li
Dante
Dante
Dante
Deadpool
dp + h
70,000
Katana-Rama!
Deadpool
air qcf + l
70,000
Trigger Happy
Doctor Doom
m
40,000 X 2
Standing Medium
Doctor Doom
h
55,000 X 2
Standing Heavy
Doctor Doom
b + h
20,000 x 1 ~ 8
Hidden Missles
Doctor Doom
qcf + atk
20,000 X 4 ~ 12
Plasma Beam
Doctor Doom
qcb + atk + atk
20,000 X 25 ~ 50
Photon Array
Doctor Strange
qcb + m -> qcb + h
90,000
Flames of the Faltine
Doctor Strange
qcf + atk + atk
33,000 x 10
Spell of Vishanti
Dormammu
df + h
20,000 x 5
Flame Carpet
Dormammu
dp + atk
35,000 X 4
Purification
Dormammu
qcb + h (after dark spells)
variable
Liberation
Dormammu
dp + atk + atk
400,000
Dark Dimension
Felicia
Firebrand
Firebrand
Frank West
Frank West
Frank West
Frank West
Ghost Rider
b + h
35,000 per Hit
Heartless Spire
Ghost Rider
qcf + l
20,000 per Hit
Hellfire
Ghost Rider
dp + atk + atk
20,000 x 11
Spirit of Vegeance
Haggar
Haggar
Hawkeye
qcb + l -> atk
50,000 - 80,000
TrickShot
Hawkeye
dp + m
25,000 per Arrow (up to 10)
RagtimeShot (Kamikaze)
Hawkeye
dp + atk + atk
50,000 per Arrow (up to 7)
Kiss of Fire
Hawkeye
qcb + atk + atk
430,000
Tag Team Special
Hsien-Ko
Hsien-Ko
Hulk
charge b , f + atk
40,000 X 4
Gamma Wave
Hulk
qcf atk + atk
80,000 X 4
Gamma Tsunami
Iron Fist
qcb, m
85,000
Crescent Heel
Iron Man
dp + atk
66,500 - 116,900
Smart Bomb
Magneto
qcf + atk + atk
70,000 X 6
Magnetic Shockwave
Magneto
dp + atk + atk
400,000 + 1,000 per button mashed
Gravity Squeeze
MODOK
d + m
20,000 X 5
Standing Medium
Nova
f + h
100,000
Nova Slam
Nova
dp + l
90,000
Centurion Rush
Phoenix
air qcf + l (or m )
20,000 + 67,000
TKShot
Rocket Raccoon
qcf + l
40,000
Spitfire
Rocket Raccoon
dp l -> h
70,000
Oil Bomb
Rocket Raccoon
dp m
70,000
Mr. Flapper
Rocket Raccoon
qcb + atl + atk
220,000
Mad Hopper
Rocket Raccoon
dp + atk + atk
370,000
Rocky Raccoon
Sentinel
qcf + l
150,000
Rocket Punch
She Hulk
d , d , s -> f -> l
80,000
Chariot into Torpedo
She Hulk
air d + h
100,000
Senton
Shuma Gorath
charge d, u + atk
20,000 X 10
Mystic Ray
Shuma Gorath
dp + atk + atk
15,000 per hit (random hits)
Hyper Mystic Smash
Shuma Gorath
qcb + atk + atk
25,000 X 20
Hyper Mystic Ray
Spider-Man
air df + atk + s
20,000
Web Glide
Storm
qcb + atk
30,000 X 6
Double Typhoon
Storm
qcb + atk + atk
13,000 X 35
Hail Storm
Storm
dp + atk + atk
30,000 + 15,000 X 13 + 120,000
Elemental Rage
Super-Skrull
h
90,000
Standing Heavy
Super-Skrull
d + h
80,000
Crouching Heavy
Super-Skrull
d , d + h
30,000 X 3
Worm Squash
Super-Skrull
air d + h
70,000 + 50,000
Brutal Pile Bunker
Super-Skrull
dp + atk
80,000 + 50,000
Metero Smash
Super-Skrull
dp + atk + atk
450,000 over 13 hits
Death Penalty
Taskmaster
air qcf + m (or h )
50,000 X 1 ~ 3
Aim Master
Taskmaster
air qcf + atk + atk
20,000 X 25
Air Legion Arrow
Thor
dp + h
70,000 + 100,000 + 20,000 X 3
Mighty Smash
Thor
dp + atk + atk
130,000 per hit (max 4 hits)
Mighty Thunder
Wolverine
df + m
70,000
Sliding Claw
X-23
qcf + hold m
135,400
Charged Ankle Slice
Work in Progress!!!