1.Ditto used Transform on Bidoof!
3.Ditto has no moves left!
So, will Ditto use Transform again, or will it use Struggle?
NO I'm pretty sure that Ditto would use The Bidoof's Moves ;)
But if you meant to put Bidoof's name were you put Ditto's name then yes it would use struggle :) Or If your saying when Ditto uses Transform on bidoof and all his moves have 0 PP then yes It would use Struggle.
I love Weird things ¯(°_o)/¯
stuggle is when you have no moves left so all you can do is do SOME damage and hurt yourself