wow, didn't know this game was discussed here.
This is actually the game I mainly play, Pokemon is only really just for fun with me, I play MK7 competitively. I have 34k vr, if anybody here wants to race me I could.
Here's one of my TTs:
also for the person who posted the Rainbow Road Time Trial, don't use Yoshi. You may like him but he's slower than the others. Use Bowser, Wario, Metal Mario, or Honey Queen, they are the fastest characters. I have 1'40"310 myself but thats with a heavyweight, you could beat me me if you switched to one of those 4 trust me. Also your last mushroom could use better spotting, the ending hop can be done shroomless. Apply all of this, and I can see you getting 1'38"xxx.