Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
I saw on Twitter that you mentioned the dreadful 3D rips on Showdown u__u; If you'd prefer to use the fan-made sprites, you can click on the button in the top-right and check "Use BW sprites" instead!