This joke should have been made 4 years ago... But better late than never!
Rainbow was a children's TV show broadcast on Thames TV in the UK from 1 September 1972 to 31 December 1992 featuring an eclectic mix of characters.
Its a pony-shop of this pic here:
Alternative Title: Taste the Rain, Bro.
Dashie gets caught trying to take all the cider before Pinkie Pie gets any. Her plot was unholy revenge.