A few people were confused about this, and I was too. In ROTF, when Sideways was speeding around, Lennox said "Arcee twins, target coming your way!" Now when he said that, did he mean Arcee twins, as in all three bikes (Even though twins would be two). Or did he mean Arcee, twins, Arcee being a separate component from the other two bikes (Because Chromia and Elita look more alike). Or Arcee twins, as in all three bikes being referred to as Arcee (Because according to Hasbro Arcee is basically a spark divided in three) and the twins, Skids and Mudflap.