In pokemon emerald when a ditto copies another pokemon will all it's stats increase? I mean is it's hp de sam

are u thinkin that when a ditto transforms into a deoxys(for example) its stats change to match deoxys? If so , no. its orginal stats will stay the same but its moves will adapt to the ones of the deoxys EG (ditto has 76 hp and deoxys has 393 hp. ditto transforms into dexys and it still has 76 hp)