E-rated” Ace Attorney Investigations: Miles Edgeworth cartridge

I got a cartridge of Ace Attorney Investigations: Miles Edgeworth on , and played the beginning of the case on it, as right now it seems to work competently, but the cartridge says rated E when the game is actually rated T. Does anyone have ideas why that is? And what is others’ advice on

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New action game component that allows for exploration of crime scenes using either D-Pad inputs of the DS/DSi stylus to uncover clues. Crime-solving

Ace Attorney Investigations: Miles Edgeworth