Words that end in “r” “rk” “rt” “rd” and others, always ignore the “r” because in British English it is barely pronounced and the Japanese don’t have a way to represent the subtle sound it makes.
I think the usual view is that in those English accents (including mine) ‘r’ after a vowel is not pronounced at all. There’s no subtle ‘r’ sound, we just drop it entirely, leaving just the long vowel sound. For me, “farther/father” and “source/sauce” are pronounced completely identically, for instance.
I wonder where “Iwark” in particular as a spelling comes from, though: presumably the Japanese pokemon designers started with that as a name and then katakana-ised it?
I don’t have much t-glottalization at all, I think – in the UK it’s traditionally been a slightly stigmatized pronunciation. My younger brother uses it more than I do, and I can remember our mother telling him to “speak properly” when he asked somebody to “pass the bu’er” at the family dinner table when we were kids…
I think this is just a typo on bulbapedia’s part (or maybe whatever there source is).
pretty sure his name is a combo of 岩・いわ (which means boulder) and the English/katakana word
スネーク (snake). My guess is that some software or something translated the katakana into romaji and assumed an ‘r’ into it.
The intro at the top of this bulbapedia page says that there are “official romaji names” assigned by the developers, trademarked, and so on, and they’re not always simple romanization of the katakana. So I guess this is one of those?
I feel like it’s kind of a mix of class differences/regional differences/formal vs casual. If I’m talking to my friends I’ll use glo’al stops, but if I’m in a job interview or something then I’ll properly annunciate my t’s and speak in more of an RP accent. I’ve definitely noticed more/less of it in different places though.
However, as “ark” is translitered to アーク, it is not strange at all to transcribe a pokemon name back that way.
Those are exotic names after all (note they could have chosen to go to kanji compounds, but probably it was not exotic enough)