Kingdom Castle Animations

Kingdom Castle Animations, often abbreviated as KCA, was a website founded in 2005 by Topcat, also known by the other aliases topcat13 and Blade. The website was dedicated to Flash animations, comics, and sprites revolving around preexisting franchises such as ', ', and . There were also several more original characters created alongside them, such as the leader's eponymous persona Topcat and Sonic fan characters Blade and Blue.

For unspecified reasons, the website would eventually cease uploading content in 2007, and the website remained stagnant until shutting down in 2014.

Influence in the McLeodGaming media
In Super Smash Flash, the Sonic fan characters and  were both designed by Topcat specifically for the game, which was initially intended to be a Sonic fan game with Blade as the main character. Both are based on the fan characters of Newgrounds user Equinox-Twilight, who is credited on the game's title screen. Although the two characters were created for this game, both are owned by Kingdom Castle Animations, who is credited in the game's credits.

Following their collaboration, Kingdom Castle Animations would be listed as an affiliate of McLeodGaming. The two would work together again on Super Smash Flash 2, which was initially set to include Blade and Blue as returning fighters with new designs, with Topcat contributing to both characters' sprites. However, they have since been cut alongside all other fan characters, and Topcat himself is no longer in contact with McLeodGaming.