Three questions on subsitute?

Question

1.How much HP does it have?
2.Does its HP change with each Pokemon that has it?(non baton passed)
3.Does its HP change with each Pokemon that has it?(baton passed)

Answer 1

http://bulbapedia.bulbagarden.net/wiki/Substitute_(move)

Answer 2

1)It takes 1/4 of your Hp
2)No
3)No ,unless your Pokemon have Regenerator it can heal 1/3 of its HP

Source:Substitute

Comments

It takes 1/3 of the health, actually.

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No it takes 1/4 look at my source