Robo Goblin help

Can some1 tell me where can i change the stats of Robo Goblin ability, the +5 armor, the attack, the strenght, coz i dont find that in the SPELLS creator.

Its a unit change, not a spell change. The morphed special unit called "Robo Goblin" has 5 extra armor, damage and strength.

But i used the same unit, the only difference i made on the units was the attack range

what Pheonix meant was that the alternate form unit has different stats than the normal form unit.
So if you have a peon transforming into a dragon:
the peon will be the normal form unit with crappy peon stats.
the dragon will be the alternate form unit with boosted stats.

Actually, they are not necessarily attached to the new form, I have used the ability before with totally new units, in a form that allowed me to cast it multiple times (I was working on a hero with 3 forms, instead of two), and the problem was that it _always_ gave the +5 str, so I could rapidly switch forms and get like 500 str easy :(, I am pretty sure it is a problem (sort of) with the ability itself, in that, the bonuses are in fact tied to the ability somewhere beyond the capabilities of the World Editor...

if that is the case, base your spell off Bear Form instead.