Kirby: Right Back At Ya!: "Shell-Shocked" (found English dub of anime episode; 2005-2006)
A screenshot from the episode.
Date found: 26 Sept. 2015
Found by: Operation Hoshi no Kaabii
Shell-Shocked was the 88th episode of Kirby: Right Back At Ya!. It centered around Escargoon's shell breaking.
The episode was supposed to air on June 11, 2005, but was pre-empted by "This Week's Baseball" for unknown reasons (it is still currently unknown if it officially aired anyway or not in markets where 4Kids TV and the remainder of Fox's programs were seen on separate stations due to the main Fox affiliates in those markets refusing to clear 4KidsTV, though comments suggest that it was preempted in those markets as well). The episode didn't properly air until 2006 and was ultimately lost until YouTuber "Operation Hoshi no Kaabii" uploaded it on September 26th, 2015.