Sonic would probably be very shocked at first. He trusts Amy, so her betrayal would be unexpected. He might initially try to talk to her to understand why she did it.
Tails would probably be very helpful. He'd use his intelligence to make sure Amy has a comfortable pregnancy, like creating special devices for her. Knuckles might be a bit awkward at first but would ultimately be very protective. He'd stand guard to make sure no harm comes to Amy and the unborn baby.
Well, Sonic is a hero at heart. So when Amy gets hurt, he would first assess the situation calmly, but inside he'd be worried. He'd make sure she was stable and then look for the cause of her injury. If it was an enemy, he'd go after them. But he'd also be very gentle with Amy, talking to her softly and reassuring her that she'll be okay. He'd do whatever it takes to see her back on her feet again, like finding special herbs or items that could speed up her healing process.
Some fans might be very shocked and disappointed. Sonic and Amy have a long - established relationship in the Sonic franchise, and this would be a huge deviation from what they expect.
Tails would probably be really excited. He'd be the helpful uncle, always ready to use his mechanical skills to make cool toys for the baby. Knuckles might be a bit more gruff at first, but deep down he'd be protective of the little one. Amy would be over the moon and would constantly offer to babysit so she could play with the baby.
Sonic would be the first to react. He'd be angry and immediately start the search for Tails. Amy would be worried sick and might try to help Sonic in any way she can, like gathering information from the other animals in the area. Knuckles would be on high alert, thinking this could be part of a bigger plan to get to the chaos emeralds. He'd guard the emeralds even more closely while also keeping an eye out for any signs of Eggman's activities related to Tails' kidnapping.
Sonic's reaction could be very instinctive. He'd be the first to jump into action when he hears about the earthquake. He'd run towards the chaos, ready to face any danger head - on. Tails might be a bit more cautious at first. He'd gather information, maybe use his two - tailed copter to fly over the affected area to assess the damage. Then he'd start using his mechanical skills to create things like communication devices to help the victims communicate with each other in case the regular means are down.
Their friends' reactions would vary. Tails would be enthusiastic and start thinking of all the ways he could help. He could create little gadgets for the baby, like a mini - sonic - speed - training - device when it gets older. Knuckles would be more of a protector. He'd see it as his duty to make sure the baby is safe, especially since Sonic is his friend. Rouge would be the fun auntie type. She'd bring stylish baby clothes and tell the baby all kinds of exciting stories from her travels. And the Chaotix might be a bit clumsy but well - intentioned in their attempts to interact with the baby.
Tails would probably be very curious and eager to figure out how to change Sonic back. He might study Sonic's new form scientifically. Knuckles, on the other hand, would be a bit more confused but still stand by Sonic's side. Amy might be initially jealous because she's used to being the main female around Sonic, but then she could become a great friend and help Sonic adjust. Dr. Eggman would likely see this as an opportunity to take advantage of Sonic's confusion in her new form.
Amy might initially be in denial. She could think that Sonic didn't really mean to break her heart and that it was all a misunderstanding. So she might try to act normal around him at first.