Why would a pokeblock that expands, ignoring the obvious scientific flaws, to 300 KG, EVER be useful or worth spending time making except for the f*** of it? Like, the only practical application.... well, hell, Snorlax is the ONLY Pokémon that could eat that without dying, assuming its vital organs don't get pushed aside by it. The only use for that Pokéblock for ANY other Pokémon would be killing it. So unless this is something Oak has spent tons of time on solely for the purpose of feeding Snorlax cheaply...
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