Guys, is it allowed to run the game on Nintendo Switch?

Read the sticky thread in this forum, right above you.

Go to the VC tab and you'll see literally the 2nd run is on Switch. Wow that was hard.

No need to be rude about it.

Krytical, any questions about specific games should be asked in the forum for that game. DKC2 has its own forum here: https://www.speedrun.com/dkc2

It would appear Switch is allowed however if in doubt, ask at the link above.

Since they run the game I thought they'd know their way around the leaderboard.

Still no need to be rude whatsoever. They were only asking for help.