Talonflame (STS 96). Talonflame does not give the option to take a mulligan and draw a new hand when you open with it and no Basic Pokemon in your hand.
------------------Begin Game Log------------------
The game is about to start
Type: QuickPlay
Format: 2016 (XY-STS)
Battle begins between KulotskilonX and dariannigro!
REQUEST TIMER: User did not respond in time, disconnecting
No response received from KulotskilonX
dariannigro wins the game! Opponent left
Game was ended