There are a bunch of fun gecko codes you can already download in Dolphin straight off of the gecko codes website, but here are a couple more (for golf)

To enter them right click WSR in Dolphin, hit properties, hit the Gecko Codes tab, and hit Edit Config, you can paste these anywhere as is.

I helped Mal1t1a with his "control the golf ball" code so it's easier to use now, and I don't really know where else to post it but I figured it might be useful/fun for someone here. The other one is just a code that wasn't on the website that makes every shot in golf register as your first shot.

So far these are the codes I have listed:

Control P1 Golf Ball (Tendog's fix)

Always get a hole in One (Golf)

Golf Wind Speed (NTSC + PAL + JP)

Frisbee Wind Speed (NTSC + PAL + JP)

Here is a video I made showing off the golf wind code, also explains how to enter it in Dolphin:

text formatting on this site screwed up the code, but you can find them here: https://pastebin.com/gYN6HbjZ

Let me know if you need any codes/versions in a region not available and I will do my best to make it.