Case 1 : "Curling up, then rolling into its foe." gives serious rollout vibes. Moves typically couldn't be used as clues...unless it's an extremely early generation where the move is used by few pokemon. For rollout, we have Golem and Sandshrew as likely candidates but the second eliminates Sandshrew so Golem.
Case 2 : The entry literally is stating this without any involvement of moves. In this case, we're looking at the entire pokemon pool and judging based off of appearance and well, already known entries. The likely answer is the Phanpy line. Donphan.