@madmax: I'm not a Spongebob fan, but those are far from the strangest controllers for the PS2.
They made NFL and NBA ones for all the teams, and Star Wars wireless ones (we've got a Vader one floating around somewhere), those uncomfortable looking Street Fighter ones, I have one from Shadow the Hedgehog (it's super small and comfy), at least one Simpsons controller (pink, with Lisa on it), that insane Dragon Quest Slime controller, and, of course, the infamous RetroCon (which we somehow have like 5 of?):