Butterfree

Butterfree is one of Pokemon species in the Pokemon series. The speices' name probably is a combination of Butterfly and free (though it is unknown why the name free is in there, since most of the time they are in the hands of trainers). Unlike actual butterflies, Butterfrees only have two legs, compared to the real insects six. Their wings have toxic dust on them that allow them to fly through the rain, which most bug Pokemon aren't able to.