It's 5th generation Pokémon.
And there are many episodes about her.
She even has arc in anime about her =)
It's the first arc of Best Wishes season 2.
She also plays a little role in last episodes of Best Wishes season 1.
Hey, I just joined this forum because I was so curious about your signature, is it made by yourself or that pokemon in the hand of ash trully exists?? I have not played pokemon beyond emerald which I didn't like too much. I believe Pokemon Gold/Silver/Crystal and FireRed/LeafGreen/Blue/Red/Yellow are the best pokemon, maybe bad graphics but defenitely the most fun.
Anyways I wanted to ask, whats the name of that pokemon is there any episode with it?? Thanks!!