BB8 Head
/summon ArmorStand ~ ~ ~ {CustomName:"BB8-Head",Marker:1b,DisabledSlots:2039583,NoGravity:1,Invisible:1,Small:1,HandItems:[{id:stick,Count:1},{}],Pose:{RightArm:[170f,-70f,90f]},ArmorItems:[{},{},{},{id:skull,Damage:3,Count:1,tag:{SkullOwner:{Id:07d764e8-cdd8-9e92-475d-43962216bc0c,Properties:{textures:{Value:eyJ0aW1lc3RhbXAiOjE0NTI4MDM4MTI2OTgsInByb2ZpbGVJZCI6IjYyMTQxMTlhODVlOTQzZDZhMjNmZDNhOTNjNjJjODdmIiwicHJvZmlsZU5hbWUiOiJBbGNhdHJheklUQSIsInRleHR1cmVzIjp7IlNLSU4iOnsidXJsIjoiaHR0cDovL3RleHR1cmVzLm1pbmVjcmFmdC5uZXQvdGV4dHVyZS9jYTNkNGM1OTM4ZmU3ZjdkMmY3MjVkMDJkNjk0YzExMTFlNGQ5YzdlZjQ5Y2JkYmVjZWFhYzlmYmQ5ZiJ9fX0=}]}}}}]}

BB8 Body:
/summon ArmorStand ~ ~ ~ {CustomName:"BB8-Body",Invulnerable:1,DisabledSlots:2039583,NoGravity:1,Invisible:1,ArmorItems:[{},{},{},{id:skull,Damage:3,Count:1,tag:{SkullOwner:{Id:1e88822c-ff4e-2b53-95e7-9f2ddc9324f4,Properties:{textures:{Value:eyJ0aW1lc3RhbXAiOjE0NTI4MDM4NTE5NjksInByb2ZpbGVJZCI6IjYyMTQxMTlhODVlOTQzZDZhMjNmZDNhOTNjNjJjODdmIiwicHJvZmlsZU5hbWUiOiJBbGNhdHJheklUQSIsInRleHR1cmVzIjp7IlNLSU4iOnsidXJsIjoiaHR0cDovL3RleHR1cmVzLm1pbmVjcmFmdC5uZXQvdGV4dHVyZS9iNDI4Mjk4OWU1MjY4YThjM2MwYmU3OTQ5ZWMyZGUxMzc3N2EzZDc2YTAyZjZmMjNiODJlODRkNDgwNGJlYSJ9fX0=}]}}}}]}