It's all about animating.
for example,reanimete goku,and put the ssjhead in the body,then when animating let it pop out,and then he turns ssj3.
So u have like 2 transformations in 1,that means u get the power as ssj etc,but ssj3 skin.
This way u can do normal-ssj-ssj3,but u cant stay ssj,it will just be between the real transformation.
like this
|transformation sequence|
---------------------------------
| normal* - ssj** - ssj3*** |
*orignal
**animation
***transformation.
for example,reanimete goku,and put the ssjhead in the body,then when animating let it pop out,and then he turns ssj3.
So u have like 2 transformations in 1,that means u get the power as ssj etc,but ssj3 skin.
This way u can do normal-ssj-ssj3,but u cant stay ssj,it will just be between the real transformation.
like this
|transformation sequence|
---------------------------------
| normal* - ssj** - ssj3*** |
*orignal
**animation
***transformation.