Ressha Sentai ToQger - 烈車戦隊トッキュウジャ

Ressha Sentai Tokkyūjā / Train Squadron Limited Express Ranger /烈車戰隊
Five young people travel on the Rainbow Line. But they have several problems: they'll often arrive at a station only to find it's been taken over by the evil Shadow Line, they can't remember anything beyond their childhoods, and there are lost trains (Resshas) that need to be found.