"Die heisse Spur", later "Tom Turbo" is an Austrian kids show, featuring a haunted looking bicycle solving supernatural crimes.
Ep181: "Die unheimliche Uhr" ("The creepy clock"):
A mysterious clockmaker and a strange clock; you know what's coming...https://www.youtube.com/watch?v=JPtPZwGf_wghttps://www.youtube.com/watch?v=w78KO6hUSn4
Ep "Das Kleid aus dem Geisterschrank" ("The dress from the ghost wardrobe")
Wearing a cursed dress may cause age-altering effects, as super model Heidi Himmlich has to find out.https://www.youtube.com/watch?v=o58RcvvS7UM
Slightly more weird stuff:
Ep179 "Die Nacht der Puppen" ("The night of the dolls"):
Benni shouldn't have visited this creepy doll museum. Now he has to steal a stone from mars, or the evil dolls will turn him into a baby doll "IN FRONT OF ALL OF HIS FRIENDS AT SCHOOL!", as they declare.
- "Oh no, they will bully me !" is his reaction. Yeah, that's the worst thing about baby doll transformations, being bullied afterwards...https://www.youtube.com/watch?v=a8x-crpcZQkhttps://www.youtube.com/watch?v=VVfBH6hVleo
EP "Pony Paula bitte melden":
Male adult villain turns into a young female girl with a not so young female voice.https://www.youtube.com/watch?v=uZKlctRXbYE
(youtube _title_ wrong...)
EP166 "Der Plem-Plem Saft"
Well, the evil professors Go-Nuts-Juice turns you stupid. That's not really a mental regression, but it looks like one. So you may still like this...https://www.youtube.com/watch?v=OWXRz0XGq_Ahttps://www.youtube.com/watch?v=S104UrW0TaY