Super Sentai S45E15 - Tune in! A Sharp Turn into Retro!

Ah, this takes us back... The city has become all retro, and the Zenkaigers get a sudden blast from the past. Not to mention, is this where Yatsude makes her debut? Kaito's grandmother turns out to be extremely retro, as the others encounter a lonely boy who goes by "Ryo". It's said when two people meet in a retro world, the most retro adventure ever begins.