Antoinette
"Hide and seek.. Seems dangerous, but fun!" He watches the Pokémon play, his own garchomp watching with him. What interesting Pokémon.. 

"Onion? That's quite the name! And carrot too.. Where did those come from?" 

His garchomp tries slowly while they discuss approaching to the Pokémon, looking intrigued.
Regena
"Oh, I found them in a little box with some half eaten carrots and onions"

*Hearing their names, the two zorua would run upto Pietra, jumping up and down wondering why they were called. One would then notice the grachomp and run upto it, before trying to climb the dragon pokemon*

"They also really love the caves for some reason, probably because of the rocks"
Antoinette
Garchomp allows it easily, growling playfully at the two. 

"I see.. Unfortunate they were only left there, but I admit it's nice you were able to find them! They seem happy." Pierre smiles at her. "Garchomp certainly enjoys their company too.. It seems like caves would be a fun place for small Pokémon. It's practically a playground!" He claps his hands together cheerfully.