Megвђ™s — Monster Switch Nsp [update] (eshop)

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While Roy has 99,999 HP, the real challenge is keeping Meg happy. If Roy takes damage, Meg gets upset; if she starts crying, her power triggers the apocalypse, resulting in a game over. Meg’s Monster Switch NSP [Update] (eShop)

Players control a nearly invincible monster named Roy who must protect a young human girl named Meg in a world of monsters. The specific phrasing in your query is common