Welp, it worked now! I'm at the
battle (don't read this, Myr!).
My Wii/RD chooses some really bad times to act up. Sometimes the music gets glitchy, and the loading takes too long. At times it gives me an error screen.
Same with my Gamecube and PoR. And they both (GC and Wii) make clicky noises before they give me the error message. It's stupid.