| Season 1
|
| 6a
|
"Mermaid Man and Barnacle Boy" (tr • ga)
|
Major, debut
|
| 20b
|
"Mermaid Man and Barnacle Boy II" (tr • ga)
|
Major
|
| Season 2
|
| 31a
|
"Mermaid Man and Barnacle Boy III" (tr • ga)
|
Minor
|
| Season 3
|
| 45a
|
"Mermaid Man and Barnacle Boy IV" (tr • ga)
|
Supporting
|
| 52b
|
"Mermaid Man and Barnacle Boy V" (tr • ga)
|
Major
|
| Season 4
|
| 63
|
"Have You Seen This Snail?" (tr • ga)
|
Imaged cameo/mentioned
|
| 67b
|
"Mermaid Man & Barnacle Boy VI: The Motion Picture" (tr • ga)
|
Major
|
| Season 5
|
| 82b
|
"Night Light" (tr • ga)
|
Minor
|
| 94b
|
"Mermaid Man vs. SpongeBob" (tr • ga)
|
Major
|
| Season 6
|
| 113b
|
"The Card" (tr • ga)
|
Supporting (non-speaking, only seen on card)
|
| 114b
|
"Ditchin'" (tr • ga)
|
Supporting
|
| 117a
|
"Shuffleboarding" (tr • ga)
|
Supporting
|
| 120b
|
"Toy Store of Doom" (tr • ga)
|
Toy cameo
|
| Season 7
|
| 134
|
"SpongeBob's Last Stand" (tr • ga)
|
Cameo
|
| 135a
|
"Back to the Past" (tr • ga)
|
Major
|
| 135b
|
"The Bad Guy Club for Villains" (tr • ga)
|
Major (as younger self)
|
| 139b
|
"The Cent of Money" (tr • ga)
|
Cameo
|
| Season 8
|
| 163a
|
"Mermaid Man Begins" (tr • ga)
|
Major
|
| 176a
|
"Super Evil Aquatic Villain Team Up is Go!" (tr • ga)
|
Supporting
|
| Season 9
|
| 180a
|
"Patrick-Man!" (tr • ga)
|
Cameo
|
| 192a
|
"Company Picnic" (tr • ga)
|
Mentioned
|
| 195a
|
"SpongeBob LongPants" (tr • ga)
|
Throughout the episode, he appears on posters and billboards for "The Dark Tide Rises."
|
| 197a
|
"Mall Girl Pearl" (tr • ga)
|
Non-speaking, walking through the mall along with Mermaid Man.
|
| 202b
|
"Snail Mail" (tr • ga)
|
Cameo in a magazine.
|
| Season 10
|
| 205b
|
"Mermaid Pants" (tr • ga)
|
Cameo in a magazine.
|
| 211b
|
"Trident Trouble" (tr • ga)
|
Cameo in a magazine.
|
| Season 11
|
| 219a
|
"Man Ray Returns" (tr • ga)
|
Cameo (non speaking)
|
| 220
|
"The Legend of Boo-Kini Bottom" (tr • ga)
|
(Costume)
|
| 223b
|
"Bunny Hunt" (tr • ga)
|
Cameo in SpongeBob's comic books.
|
| 224a
|
"Squid Noir" (tr • ga)
|
Cameo in posters and comic books.
|
| 230b
|
"Bottle Burglars" (tr • ga)
|
Cameo in a magazine.
|
