Card Rulings:Sinister Sprocket

OCG Rulings

 * As the effect of this monster is not mandatory, it looks as though it will miss the timing, similar to how Pinch Hopper cannot be activated when it is tributed. However, Konami has ruled that this card's effect is an exception to the common rulings of missing the timing, and the effect can still be activated after it is sent to the Graveyard for the Synchro Summon of a DARK Synchro Monster.