"Grindelwald!" they all exclaimed.
The evil wizard smiled abhorrently. "I must thank all three of you for bringing me one step closer to the Toenail of Icklibõgg," he said, not noticing Nagini was there. Then his eyes turned to Newt. "That pumpkin disguise is clever, I'll give you that. But not clever enough! I still know it's you, Scamander!"
"Who's 'Scamander?'" asked Newt. "My name is... Mr. Pumpkin." Tina facepalmed.
"That brilliant alias does not fool me!" Grindelwald declared. "Besides, your voice sounds like Scamander's."
"I think you'll find that my voice is a little more echoey than Scamander's. I mean... what does Scamander's voice sound like? I have no idea as I've never met... what is Scamander's gender identity anyway?"
"He/him," said Grindelwald. It turns out even Grindelwald wasn't evil enough to misgender someone. This is canon now.
"You see, I simply know nothing at all about this 'Scamander' person," declared Newt. "Is he a person? I don't even know that much!"
Gritting his teeth evilly, Grindelwald lobbed the counter-curse at Newt, causing the pumpkin to explode and leave Newt's normal head exposed. Newt smiled sheepishly.
"Are you also going to undo the curse Grimmson put on Tina?" asked Jacob, gesturing to Tina's antlers.
"Why? Is something different about her?" Grindelwald asked haughtily. "She looks the same to me."