I’d argue that it’s a joke making fun of the fact that it exists at all; generally speaking, the Good/Bad guys aren’t the highest of quality, especially the earlier ones. Overall, it falls into a category of “So bad it’s good” jokes, which admittedly, not everyone finds funny.
Also to note: to my knowledge, Good Guy jokes existed before Reviving Bionicle had anything to do with it. RB just boosted it back into mainstream.
Also also, if you guys want to discuss the series further, head on over to the Reviving Bionicle topic: