Casey makes a drawing of him defeating Raphael in artwork reminiscent of the Mirage TMNT comics.
The Ninja Turtles and Casey Jones meet each other for the first time in this episode.
When Raphael is venting on the roof and Casey Jones sees him it's similar to a scene in the Teenage Mutant Ninja Turtles (1990) live-action movie where Raphael is kicking and punching the air in anger.
At the end of the episode Donatello says, "You know what this means, right? Now we have 2 Raphaels!"
Donatello is portrayed by Rob Paulsen, who himself previously played Raphael in the original Teenage Mutant Ninja Turtles (1987) cartoon.