[Taiko no Tatsujin Wii 2] Part 6 - Yttrium Boss Battle!

Once again, an angry Dr. Waruru hearing the fun-sounding music of the Festival sends another one of his robots down to the festival to destroy it.
WaruMecha 002: Yttrium!
Dr. Otowa picking the distress signal from the Festival Surveillance System, sends Don and Katsu to the Festival Grounds. There, Yttium is intoxicating the air with the horrible sounds of Dr. Waruru's theme song.
Don-chan's head begins to ache from the horrible song. With that kind of rhythm, nobody can have any fun! However, Kacchan thinks he kinda likes it a bit.
Arumi, feeling her metal head herself ache, tells Don and Katsu to play a groovy fun song against Yttrium. As a result, they transform into a heavy metal rock-star attire!
Yttrium's systems malfunction from the Don-Soul in battle and shuts down. Dr. Waruru, having his plans foiled again, retreats.