Was Snowboard Kids 2 ever released in Europe?

I have looked at several sources to give you a decent answer. From what I can gather, there has never been a release in Europe. Though some sites do show it being sold in Europe , like you said. The only PAL-release was in Australia.

[1]

While it's prequel was a standout series on the N64, Snowboard Kids 2 was a rarity. It's only non-japanese release was in Australia

[2]

If all else fails, the game received a PAL release in Australia I believe

Though the following site mentions that Europe was were 16.% of the sales are from. This is most likely due to ordering out of Australia and being sent to Europe Through Australia. Or perhaps people just buying the Japanese version

TLDR: No, it appears there is no european release, those sales are most likely australian version shipped over.