Usagi's face completely lights up the moment the Cyndaquil makes its debut on their little group. What luck! She hadn't expected it to be this easy to find one! Luck sure was feeling nice to them... at least that's what Usagi's current mind set was. She doesn't take into account that it might try running or that it may become a hostile pokemon.

Bu, she tries to keep her excitement down as she's been asked to be quiet(er than normal) and instead she just looks to Ami to see what the girl would do next.

This was her pokemon search after all. Far be it for Usagi to do anything and accidentally become its favorite or hate her so much it refused to travel with them... that would be really awkward.