Rampaging Mettool
S5:E14
2006
IMDb
A giant-sized Mettaur virus that was once a student of Moliarty and Press' has also appeared in DenTech City, and the infection of the Zero Virus has caused him to go berserk. Lan and Chaud CrossFuse to subdue him, but in the end, only a song sung by Moliarty and Press can calm the beast down.