基本
Select Pose Bones in Weight Paint Mode
対称化する (Mirror)
How to Copy Vertex Weights from L to R
X Mirror / Mirror Vertex Groups (Changes)
転送する (Transfer)
こちらのページを参照
Rigged Character Weight Paint Transfer in 60 Seconds!
Easy Rigging of Clothes in 30 Seconds
Transfer Weights from One Mesh to Another
How Data Transfer Modifier Really Works #1
Transfer Weights from One Mesh to Another in Blender 2.9
How to Rig Armor Quickly with the Data Transfer Modifier