This is an exhaustive search but I feel like doing it now. This is uber-nerdy but I decided to catalog the different poses the Rangers do. This is more common in Super Sentai and ignored or not focuses on in Power Rangers. For example, I met suit actor/stunt man Yasuhiro Takeuchi and he did the poses for each Ranger he ever did at PMC 4. These poses are usually in the roll call. Another tradition in Sentai is for the actual actors to do the poses 'de-morphed' in the finale. This is the last one I cover. I am covering early Sentai.
1975
Goranger
Goranger
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Aka Ranger
Left leg extended, right leg bent at knee, left arm bent, near waist and right arm extended upwards.
Left leg extended, right leg bent at knee, left arm bent, near waist and right arm extended upwards.
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Ao Ranger
Knees bent, left arm extended diagonally and right arm bent and near face.
Knees bent, left arm extended diagonally and right arm bent and near face.
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Ki Ranger
Arms out.
Arms out.
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Mido Ranger
Left arm bent over head and near head. Right arm extended forward. Left leg bent at knee.
Left arm bent over head and near head. Right arm extended forward. Left leg bent at knee.
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Momo Ranger
Left arm extended upwards and right arm close to under chest, left leg bent at knee, right leg back.
1977
JAKQ
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Spade Ace
Left arm horizontal under head and right arm extended upwards.
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Diamond Jack
Arms extended out.
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Clover King
Left arm bent and pointed upwards and right arm extended outward towards the right.
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Heart Queen
Left arm extended upwards diagonally and right arm pointed forward.
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Big One
Left arm bent to chest, right arm extended outwards and legs bent at knees.
1979
Battle Fever J
Battle Fever J
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Battle Japan
Legs bent at knees, left arm bent and pointed upwards and right arm extended forward and fingers extended.
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Battle Cossack
Knees bent, left leg extended slightly, left arm horizontally bent in front of chest and right arm bent, pointed upwards.
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Battle Kenya
Crouched down, left leg extended and right leg bent at knee. Left arm bent near hip and right arm bent, hand over head.
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Battle France
Legs almost close together, right arm extended upward and left arm bent at elbow.
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Miss America
Legs bent at knees, left arm bent and pointed upwards and right arm extended forward and fingers extended.
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Battle Cossack
Knees bent, left leg extended slightly, left arm horizontally bent in front of chest and right arm bent, pointed upwards.
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Battle Kenya
Crouched down, left leg extended and right leg bent at knee. Left arm bent near hip and right arm bent, hand over head.
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Battle France
Legs almost close together, right arm extended upward and left arm bent at elbow.
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Miss America
Left leg bent at knee, right leg straight, left arm bent and near hip and right arm slightly bent and pointing upwards.
1980
Denjiman
Denjiman
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Denji Red
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Denji Blue
Left arm bent horizontally and fists clenched, right arm extended back.
Left arm bent horizontally and fists clenched, right arm extended back.
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Denji Yellow
Left arm extended downwards and right arm bent at elbow, pointed up.
Left arm extended downwards and right arm bent at elbow, pointed up.
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Denji Green
Arms extended out
Arms extended out
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Denji Pink
Right arm bent downwards and left arm bent horizontally across chest.
Right arm bent downwards and left arm bent horizontally across chest.
1981
Sun Vulcan
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VulEagle
Right leg extended, left leg bent at knee, left arm bent horizontally in front of chest and right arm extended upwards.
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VulShark
Right leg straight, left leg extended horizontally, torso pointing right and left arm pointing right outwards. Right arm tucked in. Like a shark!
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VulPanther
Arms bent and up, left leg bent at knee in front of right leg. Right leg behind left leg and extended back towards the left.
Right leg extended, left leg bent at knee, left arm bent horizontally in front of chest and right arm extended upwards.
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VulShark
Right leg straight, left leg extended horizontally, torso pointing right and left arm pointing right outwards. Right arm tucked in. Like a shark!
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VulPanther
Arms bent and up, left leg bent at knee in front of right leg. Right leg behind left leg and extended back towards the left.
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Goggle Red
Left arm bent, near waist and right arm up and bent.
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Lean forward, right arm toward back and left arm pointing forward.
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Goggle Yellow
Arms out.
Arms out.
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Goggle Black
Arched forward, arms out and bent.
Arched forward, arms out and bent.
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Goggle Pink
Arms out like a hug.
Arms out like a hug.
1983
Dynaman
Dynaman
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Arms out and up in air.
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Dyna Blue
Legs crouched down like sitting and arms out in a 180 degree angle.
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Dyna Yellow
Right knee bent, left leg out, left arm out straight forward and right arm bent and right hand near head.
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Dyna Black
Right leg in front of left leg, right leg bent at knee and left leg extended out back with right arm extended outward and left arm near body.
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Dyna Pink
Legs bent, arms crossed in front and away body
1984
Bioman
Bioman
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Legs apart, right leg bent at knee, left arm out and up, fingers spread and right arm away with fist clench.
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Blue Three
Right leg extended and away to the back. Left leg bent
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Yellow Four
Left out forward and upward, right arm behind, near head and legs apart, right leg bent at knee.
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Green Two
Fists facing each other, elbows out, left leg in front of right leg, left leg bent and right leg extended out.
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Pink Five
Legs close to each other, right knee out, left arm bent horizontal near chest and right leg straight upward.
Magne Warrior
Appeared in one episode. He was an early prototype for a sixth ranger. Legs apart, left arm out and right arm bent and slightly up.
1985
Changeman
They appeared as Blitz/Dragon in Super Megaforce
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Legs together and arms out.
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Change Pegasus
Leaning forward, right leg bent at knee and left leg extended backwards and arms facing backward.
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Change Mermaid
Arms crossed and legs close together.
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Change Gryphon
left leg extended back and right leg bent at knee and arms out (and elbows bent) with hands like claws.
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Change Phoenix
Right leg extended back, left leg bent at knee and arms out.
1986
Flashman
They appeared as Prism in Super Megaforce.
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Flash Red
Left arm above head and right arm pointing forward.
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Flash Blue
Crouching down with legs apart, arms up and out pointing up.
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Flash Yellow
Crouched down, right leg slightly out, right arm bent horizontally close to chest and left arm extended out.
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Flash Green
Standing up straight, left arm bent vertically pointing up and right arm close to head.
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Flash Pink
Right leg bent at knee, left leg extended out, left arm bent, hand close to hip and right arm up in air.
1987
Maskman
Blue and Yellow appeared as Lightning in Super Megaforce.
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Mask Red
Legs crouched and down, left arm bent and clenched fist near waist and right arm bent pointing up, above head.
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Mask Blue
Crouched and arms out
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Mask Yellow
Arms apart at a 45 degree angle, left leg bent at knee.
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Mask Black
Crouched, fists clenched, left arm bent and pointing forward and right arm extended upward straight.
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Mask Pink
Similar to Mask Yellow's pose but left arm more down.
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Mask X-1
Appeared in one episode. He was the prototype for sixth rangers. Fists clenched and up, left arm slightly straight upwards and right arm bent and under face.
1988
Liveman
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Red Falcon
Crouched down, right leg bent at knee, left arm pointing forward and right arm extended pointing upward.
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Blue Dolphin
Hands pointing downward, left arm bent and right arm extended and crouched, left leg extended out and right leg bent.
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Yellow Lion
Both knees bent, left arm slightly bent and up with fingers apart. Right arm near waist.
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Green Sai
Legs apart, left arm bent upwards and right arm extended upwards.
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Black Bison
Legs crouched, body leaning forward, left arm bent and hand near chest outward. Left arm pointing up slightly at an angle.
1989
Turboranger
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Turbo Red
Left arm horizontal and bent, right arm slightly bent, near head.
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Turbo Blue
Right arm extended out and upwards
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Turbo Yellow
Right arm bent above head and left arm bent pointing down.
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Turbo Black
Right arm extended out forward with fingers close together.
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Turbo Pink
Left fist clench, bent and near body. Right arm extended upward.
1990
Fiveman
Yellow appeared as Supersonic in Super Megaforce
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Five Red
Legs apart, left leg bent at knee, right leg extended, left arm bent horizontally near chest and right arm bent and facing forward.
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Five Blue
Crouched, arms out
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Five Yellow
Right arm bent, right hand in fist near face, left arm bent and point down with palm open.
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Five Black
Left arm bent, near chest, clench fist. Right arm extended slightly up and out.
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Five Pink
Legs together, right arm horizontally bent across chest and left arm bent on hip.
1991
Jetman
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Red Hawk
Left arm slightly bent and pointing upwards and right arm bent and under face with fist clenched.
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Blue Swallow
Arms crossed across chest, away from body and in front of face. Right arm on top of left arm.
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Yellow Owl
Body slightly leaning, legs crouched, left arm down and right arm extended outwards.
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Black Condor
Left arm up and out diagonally. Right arm bent horizontally and in front of chest.
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White Swan