A/N: Slight AU.
"You have, and always will be, a great pet." Phineas knelt down, enveloping the platypus in a tight hug. "I love you pal."
"Sir, are you crying?"
"No, I'm sweating through my eyes." He couldn't take it. After everything that had happened, this boy was willing to sacrifice his memories of today in order to keep his pet. And doing it with a graciousness he had never before seen in a boy that age. Major Monogram blew his nose. He couldn't do it. "Carl, uh, before you hit that button…"
"Yes Sir?"
"Well, I was just thinking…" He chuckled. "There's really no reason Agent P can't stay with his owners. Why, if we take the necessary precautions—"
"You mean we get to remember today and keep Agent P?" Phineas' eyes shone with hope.
"Well…" He straightened up, trying to compose himself. "Yes."
"Alright!" Phineas scooped up Agent P in a rush of joy. "Did you hear that boy? We get to keep you and remember today!"
"Now don't get to excited. We still have to draw up the precautions and there's that pesky paperwork—" He looked down, feeling a tug on his pant leg. "Yes Agent P?"
Perry smiled at him, a look of genuine gratitude on his face. He nodded once, eyes brimming with tears before hurrying back to Phineas.
The boy scooped him up once more, twirling him around before hugging him to his chest.
"Sir, I'm not sure this is such a good idea—"
"Quiet Carl. Haven't you ever had a beloved pet?"
Carl looked at Major Monogram before turning his attention to the sight before him. Agent P was now sandwiched between the two boys, looking more content than Carl had ever seen him. And in that moment, he understood. "Yes Sir. I do."
