Good news, Kricketune found his niche! I saw this really cool strategy in doubles of pairing Kricketune with Cresselia. This takes advantage of Focus Sash, Protect, Endeavor, and Perish Song under the effects of Trick Room to easily clear your opponent’s Pokemon.
What exactly does Kricketune specifically add to that? Wigglytuff and Marowak also get both Endeavour and Perish Song, are faster than Kricketune under Trick Room, are significantly tougher than Kricketune (although I’m not sure whether that matters in the context of this strategy) and have more useful abilities. I mean, major props to whoever found a way to make Kricketune useful, but without more details I kinda suspect there are still other Pokémon who would do it better, even for something as specific and contrived as this.