FWIW Pocky are called Mikado in the UK (made under license from Glico by Kraft AFAICT, [0]). They're marketed as quirky [and] Japanese, rather like [1]. But, I think they only do one flavour.

Are the flavoured ones the same thin breadstick with different flavoured coatings? Are they all chocolate based?

To me they're vaguely reminiscent of Corinthians[2], which are rather like the inner part of a kit-kat too. Corinthians used to be served in ice-cream in UK restaurants.

[0] https://www.otakunews.com/Article/1451/is-mikado-pocky-a-tas...

[1] https://en.wikipedia.org/wiki/The_Mikado

[2] https://shop.countdown.co.nz/shop/productdetails?stockcode=5...