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I'm giving away these Marills as I can't continue MM'ing unless I get some box space.
I'm pretty sure that everyone has a Marill at this point, but I've gotta try regardless. And if you're wondering why they're not in Dive Balls, it's because I think the Luxury Ball would better fit the shiny.
They are free, but if you want to give me something you can trade me a Pokémon holding any berry.