I have so far found 29 different miniatures Glo Friends. 10 of them were only ever released on their own, 12 of them were produced for American fast food chain Wendy's, 4 of them came with animals they could ride in and three more which came with playsets. There was a small series (just the 4 characters) produced at the same time called Glow-Glow Pals, but these were a copy-cat series and nothing to do with the Glo Friends line.

Glo Friends were produced by Playskool in 1986-88. Each one came with a little sleeping bag which had a button hole in so you could keep your Glo Friend close at all times!

Playskool's Glo Friends
Glo Bonnie Beetle	Glo Firefly	Glo Flutterbug	Glo Horsefly	Glo Nuttybug

Glo Prayerbug	Glo Sniffles Snail	Glo Spider	Glo Tootlebug	Glo Worm

In 1989 American fast food chain Wendy's produced twelve of their own Glo Friends to promote their business.

Wendy's Glo Friends
Glo Bashfulbug	Glo Bookbug	Glo Bopbug	Glo Bug	Glo Butterfly	Glo Clutterbug

Glo Cricket	Glo Doodlebug	Glo Grannybug	Glo Skunkbug	Glo Snail	Glo Snugbug

There were at least three playsets produced for the Glo Friends - a treehouse and two large pull-along animals. Each one came with its own Glo Friend. See the Playsets section for more information on each playset.

Glo Bedbug	Glo Hopper	Glo Shuttlebug

The hard plastic little Glo Worm pictured on the left came exclusively with a My Little Pony called Baby Lickity Split in 1986. I don't know anything about the Glo Worm on the right other than it is a similar size to the worms above.

My Little Pony Pal - Glo Worm	Mini Glo Worm