Nickelodeon is bringing a massive lineup of exclusive collectibles to Comic-Con, covering franchises like Avatar: The Last Airbender, SpongeBob SquarePants, and Teenage Mutant Ninja Turtles.

When Walker received the call that he was heading to Cooperstown in January 2020, he wore a SpongeBob SquarePants shirt. The shirt also sent a subtle message, as it read, "Ain't no ordinary sponge." ...