The Glunge Age was mentioned in the Official Annual 2014 during Cap'n Buck's trip to the Long-Gone Lagoon.
During this time, Dr. Strangeglove was Sinister Minister, as stated by his Character Encyclopedia biography.
The Glunge Age[]
Narrated by Cap'n Buck
Back in those dim and distant times the Moshi-Sphere was a very different place. Everybody got around riding' Ponies cos' wheels hadn't been invented yet! Some strange species like Worldies hadn't even staggered into life. The monu-mental Moshlings spent their days standing about unstead looking rather bored. In the Glunge Age, all the Birdies lived together in an ancient tree-village called Fluttertown. Legend has it that the dwelling is now submerged deep beneath Lake Inferior.