Originally Posted by Fat celever
But hydreigon's german name is Trikefalo, meaning the ein, zwei, drei theory is incorrect by your logic also.
No, because the numbers still exist in the German names of the Deino line, only instead of ein, zwei, and drei they're uno, duo, and tri. Nothing in any of the translations of Durant relates to ranting, most of them are "iron ant" or "iron termite".
Mew's late addition we've had straight from the horse's mouth, for example here
, though Morimoto says Tajiri was in on it. So if you don't believe it, you have to believe either Morimoto or Nintendo are lying. The low index number I suggest is because Mew was put into what was a gap that would otherwise have produced a glitch Pokemon - there are several such gaps later on in the list of index numbers.