TCoH 4, Episodes 285-286
Ardina, Jovial, and Kevin practiced dancing for the upcoming HTSS Charity Concert near the Stephen the Great Monument in Chisinau, Moldova. There, they met Hani, who is revealed to own a Marcello Tahitoe (hell yeah, imagine training a singer like a Pokemon). But this is not the real singer. In TCoH 4, it is a species of Pokemon.
Our Heroes are still in Chisinau, watching as Hani battle with Mr. Vallen, sending out her Marcello Tahitoe against his newly evolved Dartrix.