Glo Friends is a short lived TV show and toy line from the 80s. The show aired along side My Little Pony and Friends during 1986, each show being 15 minutes long together they filled up a 30 minutes time slot. 
A few Baby Ponies came with a glo worm friend.
Glo Animal Friends
Mail Order Glo Friends
In 1986 through to 31 January 1987, two exclusive Glo Friends were offered as mail-order promotions. They were named Glo Prayerbug and Glo Flutterbug and were available for $2.50 each, plus 2 Moon Drops points each.