These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
So Bad, It's Good: Not the games, but DEFINITELY the voice acting. Cooking Mama's voice is a Japanese person trying to speak English while adding an Italian twang... it gets some crazy results. ("I'll help you" sounds more like "Ahl-hev-buh-you", "Wonderful" sounds more like "Vundaherbuhl", etc.)
Averted in the European Spanish dub of Cooking Mama 3, since they bothered to find a good voice actress who speaks Spanish well, and sounding cuter to boot.
Also averted in the UK, where she has an English accent.