If a mech unit with rumble scrapper gets coppied does the rumble scrapper effect adds another +2

The +1 per Rumble stacking outcome likely still holds, but the answer's reasoning relies on the copyable-traits list and the Arithmetic layer, and both were removed in 1.5, so the citations need updating.

**Yes** — a copy of Rumble, Scrapper stacks with the original, so your Mechs get **+2 Might** total. Just to be precise: the bonus is **+1 per Rumble**, not +2 per copy. Copy effects copy the copyable traits of the original — Name, Type, **Tags**, and **Rules Text** (Rule 479.1.b.1) — so the Reflection/Deceiver copy is itself a Mech with the same passive "Your Mechs have +1 Might (including me)." Passive abilities from two different sources both apply in the Arithmetic Effects layer (Rule 479.4), and there's no rule preventing identical statics from stacking — same as if you controlled two real copies of Rumble, Scrapper. The same logic also means a copy of any regular Mech is still a Mech, so it picks up Rumble's +1 even if it enters after he's on the board.