I think majority of the cast of sonic would hate Generative Ai.
Sonic - would hate it for it's environmental impact.
Tails - would for the same thing but also find it unbearable to work with.
Amy - would probably scold people for using it and to use your brain and creativity instead.
Knuckles & Shadow - would care less about it.
Eggman - not for a moral reason but would find it useless after either using it to shoot a cannon or building a robot using Chatgpt. He would learn to find it inferior. Though I don't think that helps seeing as he drills holes in the earth and is a threat to mother nature itself.
Sage - would probably try to connect with Generative Ai and just find nothing of value in it. Quickly with the help of eggman and metal sonic they decide to rid the world of this shit.