skill??? you meant how to code edo tensei? i will tell you the concept of coding it. concept is just the same as the coding shadow clones.
for every edo tensei char 1. call helper (stance state of helper) 2. inside the stance state, you have many changestates to helper's other states (walk, attack, jump, etc) 3. use random < ### as trigger for the changestates, then you can add more triggers later to give them more intelligence (edo tensei are basically AI-controlled helpers) 4. for damage, you can use hitoverride with varadd (for example, 5 hits then die) so var adds 1 with every hit then dies after var reaches 5
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