Hi, im new to Speedrunning and im really intressted in Speedrunning Rayman 3: Hoodlum Havoc for the Gamecube. So i have a couple of questions.

1. What is the best Emulator to use? (i don't have console)

2. Is this game hard to Speedrun/Learn?

3. Why does it look so cool!

Cool that you're interested in learning Rayman 3 - welcome on board!

1) The best emu is Dolphin w/ OpenGL enabled in the settings
2) It definitely takes some learning, but if you do it with some patience, you'll see yourself getting decent runs pretty quickly! Just try to avoid the things that are too hard for you at first and focus on the stuff you can do.
3) Because it IS cool ????

1. The latest dev build of Dolphin, making sure to use either OpenGL or Vulkan (Vulkan should be a bit faster).
2. There's a lot of very similar tricks with minor differences, and a lot of things that could prevent those tricks from working properly that you need to be aware of. With enough practise a majority of the tricks become muscle memory, and from there it becomes easier to learn. Some tricks are definitely harder, less consistent or riskier, but there are usually alternatives that are only slightly slower.
3. Because it's a game that normally feels quite stable, but you peek under the surface and everything is broken!