Attack Of The Mutant (1) - S2-E2
Continuity mistake: When Skipper and Libby are in the elevator, before it crashes to the floor, Libby backs up right against the wall. In the next shot as the elevator doors open, she is standing in the centre of the elevator.
Attack Of The Mutant (2) - S2-E3
Continuity mistake: As Skipper is untying the ropes from The Galloping Gazelle's body, the ropes change position and the one by his neck (dis)appears.
Continuity mistake: When the bullies put the snake in Courtney's bag, it's brown. When Finley takes it out, it's changed to black, and is also a rubber snake. And when Courtney picks it up, it's real again, and is now yellow.
Continuity mistake: When Cara and Freddy are sliding down in the coffin, Cara is lying back for a few shots, then she's sitting up with her hands holding the sides of the coffin, then her hands are the holding the front, then they're back on the sides for two shots then when they stop, her hands are in front again.
Answer: Whoever created the Masked Mutant comics would still be around to create other comics even with the Masked Mutant dead and the Galloping Gazelle retiring, so Skipper could still receive different comics with all new characters. When Skipper goes into the Masked Mutant's lair, he is hit with a beam of light that turns him into a comic book character so after saying that he's the Colossal Elastic Boy, he turns into the hero at the end of the episode.