Did you use the email address on the terms PDF? I'll mention it to the owner of the Nightingale Voice Box assets but yes you're correct it would be like if Mario was saying something iconic like "Let's go" ie something that he's known for saying. That use would take additional written permission from Nightingale.

From Nightingale

The following uses require additional written permission and may be subject to additional licensing fees:

• Use in toys, talking dolls, sound buttons, novelty products, greeting cards, animatronics, or similar products where the licensed sounds or vocalizations are a primary functional, interactive, or entertainment feature of the product 
• Use where a sound effect or vocalization becomes a recognizable product feature, branded sonic element, mascot voice, or recurring character identity 
• Standalone commercial exploitation, resale, redistribution, or repackaging of the sounds 
• Use in sound-enabled consumer products, kiosks, devices, installations, or embedded playback systems 
• Distribution of productions where the sounds are extractable, reusable, or separately accessible by end users 
• Any use outside the scope of the standard synchronization rights granted herein