Apollow

Richard is a light brown elderly citizen that makes few cameos in most episodes.

Mermaid Man and Barnacle Boy V - he makes a cameo appearance in line.

The Krusty Sponge - he makes a brief appearance in scene of crowd for fun train.

The Two Faces of Squidward - (cameo) he appears deep in crowd scene.

Slide Whistle Stooges - he was seen in breathing machine.