Chocobo

Chocobo are a fictional species in the Final Fantasy series. Some consider the species to be the mascot of the series, as they appear in almost game. Chocobo have also stared in their own games, most notably being Final Fantasy Fables - Chocobo Tales for the Nintendo DS. In the Final Fantasy series, the Chocobo are usually a source for transportation. While riding on them, no enemies will be able to attack you. Also, you are not able to bring Chocobo into dungeons, as that would lower the difficulty by much (though it would be literaly impossible to beat bosses if all you have been doing is escaping fights).