Nintendo needs to use their female characters more often in playable form

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KylieDog said:
Nintendo has only just worked out the concept of not having two Toads, maybe in 2023 we'll get more than 4 characters to choose from.

There are five constant playable characters in Super Mario 3d World. But, might I ask, how frequently in platformers do you see the ability to play more than one character (with different strengths and weaknesses?)