| File:Mermaid Man and Barnacle Boy 088.png
|
6a
|
"Mermaid Man and Barnacle Boy" (tr • ga)
|
Major, debut
|
| File:Mermaid Man and Barnacle Boy II 129.png
|
20b
|
"Mermaid Man and Barnacle Boy II" (tr • ga)
|
Major
|
| File:Mermaid Man and Barnacle Boy III 025.png
|
31a
|
"Mermaid Man and Barnacle Boy III" (tr • ga)
|
Minor; he and Mermaid Man leave SpongeBob and Patrick in charge of the Mermalair while the two are away.
|
| File:Mermaid Man and Barnacle Boy IV 010.png
|
45a
|
"Mermaid Man and Barnacle Boy IV" (tr • ga)
|
Supporting
|
| File:Mermaid Man and Barnacle Boy V 185.png
|
52b
|
"Mermaid Man and Barnacle Boy V" (tr • ga)
|
Major
|
| File:Have You Seen This Snail 016.png
|
63
|
"Have You Seen This Snail?" (tr • ga)
|
Imaged cameo/mentioned
|
| File:Mermaid Man & Barnacle Boy VI The Motion Picture 194.png
|
67b
|
"Mermaid Man & Barnacle Boy VI: The Motion Picture" (tr • ga)
|
Major
|
| File:Night Light 156.png
|
82b
|
"Night Light" (tr • ga)
|
Minor
|
| File:Mermaid Man vs. SpongeBob 094.png
|
94b
|
"Mermaid Man vs. SpongeBob" (tr • ga)
|
Major
|
| File:The Card 033.pngFile:The Card 197.png
|
113b
|
"The Card" (tr • ga)
|
Cameo on cards and card packs
|
| File:Ditchin' 070.png
|
114b
|
"Ditchin'" (tr • ga)
|
Supporting
|
| File:Shuffleboarding 052.png
|
117a
|
"Shuffleboarding" (tr • ga)
|
Supporting
|
| File:Toy Store of Doom 019.png
|
120b
|
"Toy Store of Doom" (tr • ga)
|
Toy cameo
|
| File:SpongeBob's Last Stand 064.png
|
134
|
"SpongeBob's Last Stand" (tr • ga)
|
Cameo
|
| File:Back to the Past 115.png
|
135a
|
"Back to the Past" (tr • ga)
|
Major
|
| File:The Bad Guy Club for Villains 105.png
|
135b
|
"The Bad Guy Club for Villains" (tr • ga)
|
Major (as younger self)
|
| N/A
|
136a
|
"A Day Without Tears" (tr • ga)
|
Mentioned
|
| File:The Cent of Money 192.png
|
139b
|
"The Cent of Money" (tr • ga)
|
Cameo
|
| File:Mermaid Man Begins 123.png
|
163a
|
"Mermaid Man Begins" (tr • ga)
|
Major
|
| File:Super Evil Aquatic Villain Team Up is Go! 246.png
|
176a
|
"Super Evil Aquatic Villain Team Up is Go!" (tr • ga)
|
Supporting
|
| File:Patrick-Man! 035.png
|
180a
|
"Patrick-Man!" (tr • ga)
|
Cameo
|
| File:Company Picnic 065.png
|
192a
|
"Company Picnic" (tr • ga)
|
Likeness; SpongeBob uses mustard to make himself look like Barnacle Boy.
|
| File:SpongeBob LongPants 001.png
|
195a
|
"SpongeBob LongPants" (tr • ga)
|
Throughout the episode, he appears on posters and billboards for "The Dark Tide Rises."
|
| File:Mall Girl Pearl 070.png
|
197a
|
"Mall Girl Pearl" (tr • ga)
|
Non-speaking, walking through the mall along with Mermaid Man.
|
| File:Snail Mail 005.png
|
202b
|
"Snail Mail" (tr • ga)
|
Cameo in a magazine.
|
| File:Mermaid Pants 135.png
|
205b
|
"Mermaid Pants" (tr • ga)
|
Cameo in a magazine.
|
| File:Trident Trouble 027.png
|
211b
|
"Trident Trouble" (tr • ga)
|
Cameo in a magazine.
|
| File:Man Ray Returns 088.png
|
219a
|
"Man Ray Returns" (tr • ga)
|
Cameo (non speaking)
|
| File:The Legend of Boo-Kini Bottom 004.png
|
220
|
"The Legend of Boo-Kini Bottom" (tr • ga)
|
(Costume)
|
| File:Bunny Hunt 110.png
|
223b
|
"Bunny Hunt" (tr • ga)
|
Cameo in SpongeBob's comic books.
|
| File:Squid Noir 133.png
|
224a
|
"Squid Noir" (tr • ga)
|
Cameo in posters and comic books.
|
| File:Bottle Burglars 063.png
|
230b
|
"Bottle Burglars" (tr • ga)
|
Cameo in a magazine.
|
| File:Call the Cops 155.png
|
236a
|
"Call the Cops" (tr • ga)
|
Cameo in a magazine.
|
| File:Goons on the Moon 023.png
|
237
|
"Goons on the Moon" (tr • ga)
|
Cameo in a magazine.
|
| File:Appointment TV 168.png
|
238a
|
"Appointment TV" (tr • ga)
|
Acted out by Patrick Star.
|
| File:The Krusty Slammer 154.png
|
244a
|
"The Krusty Slammer" (tr • ga)
|
Cameo on television.
|
| File:Swamp Mates 054.png
|
247a
|
"Swamp Mates" (tr • ga)
|
Non-speaking cameo (younger)
|
| File:SpongeBob's Big Birthday Blowout 401.png
|
254-255
|
"SpongeBob's Big Birthday Blowout" (tr • ga)
|
Cameo as a toy.
|
| File:Captain Pipsqueak 025.png
|
277a
|
"Captain Pipsqueak" (tr • ga)
|
Cameo on TV.
|
