- Born from the wish of Bhrama to show the greatness of celibacy.
- (Boar) to save the earth from under water by the raakshas (demon) named Hiranyaaksha.
- (Holy fire) to teach Man to perform Yagnas.
- (Horse) to protect Bhrama from raakshas by the name of Kaitabh and Madhu.
- (Bhramin twins) born from Dharma and Bhakti to kill Sahasrakunchi and do Tap (penance) for the welfare of Bharat-khand (India).
- (A great Rishi) to show the Sankhya philosophy.
- (A great Rishi) to show Tyag and Yoga, also to show how to look at the qualities in people. He made 24 Gurus for himself.
- (A great Rishi) to show renouncement and tyag to Sadhus.
- (A great king) in the beginning of the world to make the earth full of fruits.
- (Fish) to recover the stolen Vedas for Bhrama and to save king Satyavrat from the great flood.
- (Tortoise) At the time of churning the ocean for nectar, Bhagwan took this form to provide a pivot for the Mandrachal mountain.
- To show the power and use of the potions formed during the churning of the oceans.
- To protect an elephant from a crocodile, after the elephant had prayed selflessly.
- (Man-Lion) for the protection of Prahlad and to kill the asur Hiranya Kashipu (Prahlads father) but still obeying the vardan (boon) given by Bhrama
- (Dwarf/Midget) to free the devtas from king Bali by asking him for three footsteps of land.
- (Swan) to give knowledge to the Sanakaadiks.
- To give darshan to his devotee bhakta Dhruv and give him a vardan.
- To show the importance of Dharma.
- TO kill the evil Kshatriyas.
- to kill raakshas (demons) such as Raavan.
- (Great Rishi) to give mankind Shastras such as the Vedas and the 18 Purans.
- To kill evil like Kansa and to do Leela-Charitra.
- To show the importance of non-violence.
- Yet to come, to finish off Kalihuga by getting rid of all evil and restoring Satyug.
So Bhagwan has taken many forms for many reasons. But he came as Himself as the one who takes the Avatars. The one who is the Bhagwan behind all the Avatars, as Sarva-Avatari, Shri-Hari, Shri Swaminarayan Bhagwan!