I was watching the WR video, and I noticed that in the part where they faced Spike, they messed up a little bit in the 2nd round, which turned into a big error. That's why I tried a different method to defeat Spike more easily, and it seems like it worked for me. Still, this run of mine isn't perfect; I got bad RNG with Nibbles because he happened to block, but the rest was almost perfect if it weren't for Nibbles.