From Toontown Rewritten Wiki

Kaboomberg is a district that underwent temporal lockdown following an attack by the Cogs in Daisy Gardens when the first Sellbot Field Office took over Toon Headquarters on Elm Street, with live footage of the attack being captured by Toon News... for the Amused! during their weekday report broadcast on December 3, 2021.[1] The success of the attack allowed the Cogs to invade Daisy Gardens and rebrand it into Daisy Gardens, Inc.. Thanks to the Toon Council removing the lockdown restriction for the Sellbot Task Force, Toons gain temporary access to Kaboomberg while in the process of obtaining the Smasher Badge for their Resistance Rank.