|Species||Human (possibly a leprechaun)|
Dee Dee (niece)
|First Appearance||That Magic Moment|
|Voiced By||Mark Hamill|
Fergle O'Reilly is a short man, just a little taller than Dexter, and has curly red hair (a little darker than Jessica's) and black eyes. He wears a formal white shirt and tie with a green jacket, pants, shoes and hat. His overall appearance makes him resemble a leprechaun (which he may actually be considering his unique magical abilities).
- He is based on the comedian Ed Wynn.