Please provide the test file. However, for cases with a large number of parameters, it’s recommended to save them as an expression file rather than using commands.
To implement the parameters lock feature, you need to open the generated file and replace all instances of Blend set to 'Add' with 'Override'.

https://drive.google.com/file/d/1m4Od2h4yoCRVraBU2RRYYsTkRYvkZ7FD/view?usp=sharing

Here's the folder i'm working. Please open the .model3 file.

Within the left side of the Live2D Model, there will be a Manjuu (or a bird) at the activation cycle for the motion groups. At the same time, within Motion Groups, there are 2 groups named Pictures and PicturesBC. PictureBC is the original Picture Motion Group acting as a backup. You can delete the Picture motion group and renamed the PicturesBC Group back to Pictures to test even further. The activation sequence after you have clicked on the Manjuu will be: Taking Picture > Flashbang > Picture > End of Taking > Picture BTI. As of now, the Pictures and PicturesBC Motion Groups are what matters the most.

Here are the parameters which are used to make this work:

All_X: 0
All_Y: -7.58
All_Angle: (-30 to 30)
All_Size: 11.54

man_Angle: -30 to 0 (S)

feiwenposui: Heart 0 to 1 (S)
ParamEyeRSmile10: Shy 0 to 1 (S)

MB_fenweiTMD: Aura 1 to 0.5 (S)

ParamEyeRSmile17: Pissed 0 1
ParamEyeRSmile21: Bad thoughts 0 1
ParamEyeRSmile24: Excited Eyes 0 1 instant
ParamEyeRSmile25: Stunned Eyes 0 1
ParamEyeRSmile26: Shocked Eyes 0 1

ParamEyeLOpen: 0 1 1.2 (S)
ParamEyeROpen: 0 1 1.2 (S)

ParamEyeBallX: Eyes go LR -30 30
ParamEyeBallY: Eyes UD -30 30

ParamBrowR1: Brows coming closer farther -1 0 1
ParamBrowR2: Brows going down up -1 0 1
ParamBrowRAngle: Brows goes anger sad -1 0 1
ParamEyeRSmile6: Mouth going LR -1 0 1

ParamEyeRSmile9: Toggle Talk (0 on, 2 off) (IMPORTANT)

ParamEyeRSmile3: Mouth Smaller/Bigger -1 0 1
ParamEyeRSmile4: Mouth Sad/Happy -1 0 1
ParamEyeRSmile2: Close/Open Mouth 0 1

ParamAngleX: Face LR -30 30 (S)
ParamAngleY: Face UD -30 30 (S)
ParamAngleZ: Face Facing Up/Down -30 15 (S)
Param18: Neck Facing Up/Down -30 30 (S:

ParamBodyAngleZ: Leaning Upper half Body LR -10 10
ParamBodyAngleZ2: Leaning entire Upper half body LR -10 10
ParamBodyAngleX: Leaning Body facing LR -10 10
ParamBodyAngle2: Leaning body facing front back -30 30
ParamBodyAngleY: Jiggling body down up -30 30
ParamBodyAngle4: Leaning body to the left -30 30

Param70: Facing ass LR -30 30
ParamBodyAngle3: Leaning body facing back to front -30 30

ArmRAy: RArm Shoulder UD -180 180
Param34: Upper RArm Going LR -180 10
Param35: RForearm going LR -180 180
Param36: RHand going LR -90 45
Param37: RUpperArm Stretching -60 60
Param38: RForearm // -60 60
Param54: RForearm Bigger -60 60
Param41: RForearm Leaning Back Front -60 60
Param: Changing Hand Pose 0 10 (0)
Param4: // 0 10 (10)
Param83: RHandpose -60 135

Param55: RFinger -30 30
…
Param85: RFinger last -30 30

Param129: Nudging RForearm Clothes 0 1
Param114: Changing RArm Z -30 30

Param100: LArm Shoulder -15 30
Param28: Larm LR -80 65
Param33: LForearm LR -100 20
Param31: Lhand LR -60 60
Param42: Larm Stretch -30 30
Param103: Larm + Icecream Back to Front -30 30
Param43: LForearm stretching -30 30
Param52: Larm changing pose -60 90

bow5: Icecream going front back -30 0
bow_2: // LR -45 45

Param61: LFinger -30 30
…
Param82: LFinger last -30 30

bow_7: Spoon Vis 0 1
bow_27: Spoon on Ice 0 1

bow_22: Strawberry disappear 0 1
bow_29: Strawberry on spoon 0 1

bow_14: Card

Param60: Changing Leg Tex 0 1

Param27: L Foreleg LR -30 30
Param25: L Foot LR -30 30

And for the Expression File, I really have no idea what it does and how I can, well, edit it in the first place... If there's any good documents for this thing, I will have it in mind and try to use it. Thank you for taking your time. If there's any more problems, please tell me and I will try to provide more information.

https://imgur.com/a/AnhR68O
There is a button to save expression file.

Or use official cubism viewer
https://docs.live2d.com/en/cubism-editor-manual/cubism3-viewer-for-ow/

That's very interesting. I do wonder if the Cubism Viewer will also work as an editor to create entirely new motion files from scratch? Since well, creating/emulating motion files are what I have in mind.

Originally posted by Hexacore:

That's very interesting. I do wonder if the Cubism Viewer will also work as an editor to create entirely new motion files from scratch? Since well, creating/emulating motion files are what I have in mind.

As far as I know, Cubism Editor can load .moc3 files and create animations.