Mega Adventures! Block I
The main Mega Adventures! block, internally named Mega Adventures! Block I, ran from 1996 to 1999 on Saturdays and Sundays, along with a 2-hour block aired after-school on weekdays. Camelot Entertainment Sales (later known as King World Media Sales) sold barter for the block.
Stations and station groups that ran Mega Adventures! Block I included Belo, Interstate Broadcasting, Inc., KAZQ, WAGM-TV, WCSH, WHDH, WSVN, WFMZ-TV, WWLP, WPTZ, KUAM-TV, KOMU-TV, KSL-TV, XETV, America One, and Foxnet. In the first season of Block I, programs were split into three separate "sections", the "preschool section" (Popples and Budgie the Little Helicopter, and reruns of The Get Along Gang (both the 1984 and 1987 series) and Sylvanian Families), the "comedy section" (Blazing Dragons, The Adventures of Blinky Bill and Funky Town, and reruns of Super Dave: Daredevil for Hire and The Pink Panther), and the "action section" (The Dreamstone and The Legends of Treasure Island, and reruns of Voltron (only the Lion Force Voltron episodes) and M.A.S.K.). For the second season, The Adventures of the Galaxy Rangers reruns replaced Voltron and a U.S. version of Roger and the Rottentrolls (with Martin Clunes' narration redubbed by Stacy Keach) was added to the preschool section whilst the two different The Get Along Gang cartoons were replaced with an all-new incarnation.
Block I stopped airing on most stations following Christmas 1999, but America One and Foxnet continued to air reruns of the Mega Adventures! Block I shows until August 2000 and February 2001 respectively.
Mega Adventures! Block II
With multiple offers in several U.S. TV markets for Block I, a second Mega Adventures! block was launched in 1998 by Claster to meet the demand. Stations and station groups that ran Block II included USA Broadcasting, Capitol Broadcasting Company, Gray Television, Hearst-Argyle Television, Forum Communications, KONG, WSEE-TV and WNDU-TV. In early 2000, Block II was discontinued.