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I don't think it would do to well, since even with AV it's not going to be tanking any special hits like a boss: still gonna die to most fire moves and most special fighting moves. I know it sees usage in doubles but in singles Kart's suboptimal offensive typing means it really needs all the power it can get, or Choice Scarf to revenge kill things.
You're probably best off running Kart as a choiced-item user or with SD LO, unless you want to use Chople Berry/Occa berry and you have a specific target you want to take out in mind.