During Harry's 3rd year!
Remus was successful in teaching Harry how to produce a Patronus. although harry had no yet fully produced a full corporal Patronus they assumed it would be the same as his dad's since their extreme similarity.
Sirius was going to help Harry become an animagus during the summer. Until then harry had to focus on his studies
Sirius was still technically still "wanted" or "dangerous". so he did hide out in Hogsmeade with James and lily to accompany Remus son his transformations. on the last day of exams also the night of the full moon Sirus came to Hogwarts and showed the trio the shrieking shack. Remus found them there when we went to transform. Sirius got the trio out in time but Sirius got hit and had a lot of damage. the dementors still knew that Sirius was an escapee. and went to perform the kiss on him which meant them going into the grounds. this is where Harry meets is corporal Patronus. A Stag!
at the end of the year, they went back to Godric's hallow where the potter's house was.
On the next full moon, harry has to hold a singe mandrake leaf in his mouth from full moon to full moon. this was the hardest part of becoming an animagus. after this was complete which surprisingly he managed to complete on his first attempt. next, he had to find a 'small crystal vial that receives the pure rays of the moon', put his saliva-filled leaf inside, and add one of his own hairs.
next, Add a silver teaspoon of dew from a place that neither sunlight nor human feet have touched for a full 7 days. then then have to add the chrysalis of a Death's-head Hawk Moth to the crystal vial as well. they then put the vial in a dark in a quiet place and to leave there until the next electric storm.
then at every sunrise and sundown harry had to say the incantation. 'Amato Animo Animato Animagus'.
just about a week before going back to school a lightning store came and all of the marauders escorted him to where his vial was kept. Harry's vial was blood red and he repeated the incantation for the last time. he felt a lot of pain as he began to transform.
after the pain cleared harry could not tell what he had become. James switched back to his human form to tell Harry what he had become.
Harry knew he was a larger animal. harry has seen these animals before and he knew he was not a stag. like his Patronus. Before James could tell harry what animal he had become. James squealed "OMg harry you are a phoenix! that is a new kind of help with moony's transformations. a bird will be very helpful."
now that harry was an illegal animagus he could not use this ability in school unless he registered himself. he is only in the 4th year how did he complete this! sooner than Sirius and James!
when Harry went back to school the only people that knew about his new form were the marauders and Ron and Hermione after he told them on the train.
all harry knew is that he would be going to school for his fourth year at Hogwarts. he had no idea of the danger ahead for him.
YOU ARE READING
If The Marauders Lived
Fantasysome stories from moony worm tail Padfoot and prongs and lily and harry. A majority of information is not canon and is from my imagination.