@Sid100MM about character unlocking, they're done automatically when you complete a gp or when someone uses a magikoopa, costumes can also be unlocked while a race, and the coin stacks aren't a real collectible like the p switches or peach medallions they don't do anything or have any special reward just for collecting them.
it's a bit more complicated than that, but there are plans for MKCentral to host time trials, so yeah.
The hardware is the same so it doesn't matter.
(Also, pro tip, don't respond to old forums for no reason.)
go look at the 8dx leaderboards, i bet at least half the top 10 on any given category will run this game too.
If you're getting WRs then recording your controller helps show the run is legit
Not using that site till you add mario party jamboree.
@Akuretaki This reminds me of the Mario Kart combined player rankings
They take the average placement of players on all of the game's player pages and puts them into one chart.
Here's the link for it: https://www.mariokart64.com/combinedranks/