>>29066316This. The anime popularized the idea of a cute monster saying its name to appeal to kids. It just wouldn't have been nwrly as marketable for one to say "skrreonk" (See addendum: jelly filled donuts)
They were named the way they were for different reasons. Like Typhlosions japanese name is fucking Bakphoon. It made sense for the Gen 1 starters as a play on words for the English version. CHAR(sala)mander, Cha(r)meleon, Bulba(Dino)saur or Squirt(turtle)less.
Granted some Japanese names make way more sense than then the English ones, like Greninja, who's named Gekkouga overseas, Geko being a literal frog sound, (you know how the nips are about onomotopoeias) and also menaing "moonlight" and Kouga being an ancient school where they practiced ninjutsu. So it literally translates to "moonlight ninjutsu."
Translaters just simplified it by putting Ninja on top of a simplified Kero sound.