Why is raikou forced to run a rash nature?

Question

while Raikou does have some neat event moves in Aura Sphere and Weather Ball, it is forced to run a Rash nature when using either of them.
-smogon

(I would quote but it wont work for some reason).

Answer 1

It has to run Rash nature because of the special moves

• Zap Cannon
• Extreme Speed
• Weather Ball
• Aura Sphere

It's an event which has a set nature so to get those moves that nature is to be there.

Comments

Aaah i forgot its the event that limit it