Saiki Kusuo no Ψ Nan: Season 2, Episode 20

2 - 20: Impersonation via Hypnosis + High Expectations on the New, Fully Functional Mascot + This Year's the Last Time! New Year's Eve + Silent New Year's

After accidentally turning Riki and Shun into stone, Kusuo comes up with a plan to hypnotically substitute them with other friends. Hilarity ensues.