What are some good wii, gamecube, switch, ps4, or pc games that are under an hour and easy.

Since you've listed five systems, you'll have literally thousands of games to choose from, many of which will be fun to speedrun. I'd say look at some games you already enjoy and see if they have a speedrunning community, but if you want a safe bet, first-party Nintendo games are always popular.

Well there are quite literally thousands for the PC library alone.. that would take a lot of research to post all the good ones but currently I'm playing the RE2 remake on my pc and spec ops the line although spec ops the line can't be beaten under an hour. Have you tried the outlast series? Outlast 1 and 2 are perfect for speedrunning. I could do some research for you on my end and list a plethora of games I think you'd like?

If your looking for a fun platformer i recommend kuso its only 5 dollars on steam and really short WR is like 8 mins and id would love some help and be happy to help you

To be honest no game that easy and under hour because u still need to learn in the end