I feel like Mario Kart is a bit ambiguous, there's always the potential they could just re-use voice work from a previous entry rather than bringing all the actors in to go "Whoa! Ha-ha-ha. Luigi number one!" I don't know if they still do this, but in the N64 era a lot of the same samples were used for Mario Kart, Mario Party, maybe other stuff, so the actors wouldn't have been involved after the original recording sessions.

Or she did her sessions and they didn't use it.

Companies neglecting to tell existing voice talent with years of experience playing specific characters that they're being replaced is actually fairly common. With how clearly Nintendo DGAF about anyone lately it's not surprising at all. They may not have planned to tell her at all officially and someone took it upon themselves when they found out shortly before launch. Many/Most companies view voice talent as completely expendable and replaceable. For camera talent, you have the person's image as well, but with voice talent, in most cases people won't notice the actor being replaced. Especially since vocal impersonation is so common.

When she found out and when Nintendo bothered to tell her is an appreciable distinction.

That's fucked up.

Nintend*

This is so shitty. Wtf Nintendo.

I thought Jen Taylor (Cortana from Halo) voiced Peach

Nintendarseholes

That's pretty classic Nintendo.

It seems like it yeah.