The community created online leaderboards, way before covid was a thing, this one is the wimmfi leaderboard

https://drive.google.com/drive/u/0/folders/1yoj26QbPOV4yMNYJii_-4V5wSes_QxCh

This is the tutorial to connect to DS: https://youtu.be/Tk4ka9r8YT

And this is a Table comparing the Top Records of a variety of Sites: https://docs.google.com/spreadsheets/d/1MqPLErD0u-VKjMQ5TmSQnMyKuXvNk4xgf_c8h4-qjMY/edit#gid=0

Don't forget that this game has cheats and can be TASed, so as long as someone has a micro SD (a pirate card), faking a record in the leaderboards will be possible. If someone suddenly uploads a record of 00:03.000 seconds in Alpine Skiing don't panick, you are not that bad at the game, it was just a cheat.