Many Trainers are tempted to play with Nidokhan's young, not realizing their poison is strong enough to faint a Slaking. If they continue to annoy the pup, the mother Pokémon sends them flying with a Mega Punch.
If you come across a young Nidokhan playing by itself, never try to catch it. It is adept at sending foes flying with harsh tackles using its tough, scaly body.