In fact, Dumbledore had long wanted Fish to try the Animagus Charm.
However, the spell was too dangerous, and he wasn't sure Fish, who wasn't even sure what it was, would have trouble practicing it, so he put it off until now.
After all these years of observation, Fish had no trouble learning other spells, rather he mastered them faster than the average young wizard, even the Patronus, which was extremely difficult to learn, before Dumbledore dared to let Fish try it.
Of course, if Voldemort hadn't been resurrected, he probably would have watched him for another two years, but now Dumbledore wanted Fish to be stronger, and Animagus, a spell that suited his nature, was the natural choice.
Not to mention that Fish's patronus was huge... except that Dumbledore had thought Fish's patronus would be a giant squid or something.
As for whether or not Fish would turn into a tree after learning the Animagus Charm....
You're joking, wouldn't the relationship between the Animagus form and the Patronus be inevitable, or could he have turned into a phoenix himself?
Dumbledore mentally chuckled, thinking that he really was out of his mind to come up with such a crazy idea.
"Nya?"
?ω?
Fish blinked, intrigued by the suggestion.
"Albus, Albus, so Fish is going to turn into a big nya tree?"
?(??ω??)?
Apparently Fish had thought of this possibility as well, and saw nothing wrong with it.
Without waiting for Dumbledore's response, Professor McGonagall tapped Fish's head and laughed in disbelief, "How can that be! Animagus is an animal transformation, he can only turn into an animal!".
"But, you guys said before that patronus only appear as animals too nya..."
(〃`3′〃)
Fish replied unconvinced.
"How can that be the same thing?". Professor McGonagall explained to Fish through tears. "The Animagus Charm, itself, is a combination of the words "animal" and "wizard", so it can only be an animal. "
This explanation from Professor McGonagall left Fish very frustrated....
"What if Fish changes the spell to Plantmagus?".
?ω?
Fish asked reluctantly.
Then Professor McGonagall turned him down flat ...
"Don't even think about it!" she scolded sternly, "Modifying spells at will is a dangerous thing to do! Especially a spell like Animagus that targets the wizard himself!".
"Oh..."
(?ω?)
Although Fish agreed, he still muttered in a little voice of defiance, "Obviously, Minerva, you've modified a lot of spells nya...".
He was referring to a series of spells that Professor McGonagall had modified and created based on last summer's Muggle cartoons.
Professor McGonagall merely ignored him.
"That's it!"
∑(?ΦДΦ?)
Fish suddenly remembered something else, "To practice the Animagus Charm, isn't there a lot of food you can't eat for a long time?!".
"Uh, not really," seeing that Fish looked regretful, Dumbledore hastened to explain, "Actually, normal food is allowed, it's just that many wizards try to eat plain food to avoid accidentally swallowing the leaves in their mouths."
Seeing that Fish was still a bit hesitant, Dumbledore added, "Besides, aren't you curious as to what your Animagus form is? Besides, Minerva and Hermione have learned the Animagus Charm."
At first, after hearing that Animagus could only transform into animals, Fish had been less than enthusiastic about the spell, after all, to transform into animals, Fish didn't need that much trouble, especially after remembering that the spell was also particularly troublesome, he was less interested.
But Dumbledore's reasoning made it hard for Fish to say no.....
"Very well then, Fish will practice."
ε=(′ο'*)
Fish sighed, not very excited, after all, he would have to be careful with his food for a long time, which really didn't make him happy.
"Besides the Animagus Charm, you can learn great spells from me, Fish."
As Fish sighed, Dumbledore spoke again.
"So, time to teach Fish the Apparition Charm nya?!"
?(??ω??)?
Fish suddenly became excited again.
Dumbledore continued shaking his head, saying, "It's too dangerous to practice the Apparition Charm and you have to be watched at all times, but we don't have time to deal with you right now. Besides, there are Ministry sanctions for young wizards under seventeen who learn the Apparition Charm prematurely, and it would be inappropriate for us to get in trouble with the Ministry now."
"But Fish doesn't want to learn any other spells besides the Apparition Charm."
(?ω?)
Dumbledore had said so many things, but Fish hadn't taken it seriously, it was forbidden anyway, so what was the point of talking about it... Fish thought with great disgust.
He raised his left hand and said, "Fish's claws are stronger nya."
(?ΦωΦ?)?
In reality, Fish had little interest in spells other than the Apparition Charm, especially after he had awakened [Moonfire] and [Starfire].
Dumbledore did not press the issue.
He thought about spending some time teaching Fish, but after careful thought, he desisted.
With Fish's restless nature, forcing him to learn would be counterproductive, so it was best to let things take their course.
Of course, it was possible to continue with Professor McGonagall's old way of teaching stories.
The main reason she had come today was to take Fish to the Black ancestral home, to make it easier for him to practice the Animagus Charm and for Professor McGonagall to tell him stories.
So Dumbledore said, "Now, put away your Patronus, Fish, and we'll be off."
"Leave? Where to?
?ω?
Fish looked at him in confusion.
"To the Order of the Phoenix headquarters," Dumbledore said with a wink, "Thanks to Sirius' generous help, it wouldn't be so easy to find a place where no one else could find it."
"The Order of the Phoenix? What's that? Something to do with the Fawkes?"
Fish continued curiously, and Hermione's ears pricked up with equal curiosity-she hadn't seen that name in books.
"Well, it was a secret society I founded to fight Voldemort, only to disband it after he lost his powers." Dumbledore replied, "But now, in light of Voldemort regaining his powers, I've had to put it back together.... Minerva and I have been working on it lately."
"Well, any other questions, you'll ask when we get there." Dumbledore pulled out a piece of parchment and handed it to Fish, "Write down the address on it, keep it in your memory, and don't tell anyone else."
Fish looked at the parchment, and next to it Hermione moved closer, it was written in Dumbledore's handwriting that Fish knew so well, he had written on it in that fine handwriting and circled around it
The headquarters of the Order of the Phoenix is located at 12 Grimmauld Place, London.