Origion of Pokémon Namesさんのイラストまとめ

#013 Weedle
Weedle is a combination of worm (a creeping invertebrate animal) and needle (a slender piece of metal used for sewing).

#012 Butterfree
Butterfree is a combination of butterfly (an insect with brightly colored wings) and free (referring to it finally free to fly).

#011 Metapod
Metapod may be a combination of metamorphosis (transformation of insects to adult forms) and pod (a seed vessel).

#010 Caterpie
Caterpie is an abbreviation of caterpillar (larval stage of a group of insect).

#009 Blastoise
Blastoise is a combination of blast (to blow up) and tortoise (and land-dwelling species characterized by a shell).

Fun fact: Early promotional artworks show Wartortle with blue ears.

#008 Wartortle
Wartortle is a combination of war (armed conflict), tortoise and turtle (reptiles characterized by a shell).

#007 Squirtle
Squirtle is a combination of squirt (to eject a liquid from an opening) and turtle (a reptile characterized by a shell).

#006 Charizard
Charizard is a combination of char (to burn) and lizard (a type of reptile).

#005 Charmeleon
Charmeleon is a combination of char (to burn) and Chameleon (a species of lizards).