Lord Vishnu took Mohini Avatar on a couple of occasions.
One is during the Samudra Mantha, churning of the Milky Ocean to get Nectar,Amrutha..
For others please read my post Various Mohini Avatars Vishnu.
Mohini is believed to have composed a stotra on Krishna,(Avatar of Vishnu)
This rare stotra is believed to help a man to get married to his Lady Love.
Krishna is not mentioned directly in this stotra.
1.Sarvendryanam pravaram Vishnor amsam cha manasam,
Thadeva karmaanaam bheejam thad udhbhava namosthuthe.
The first among all the sense organs , the part of Lord Vishnu is the mind ,
And my salutations to that which is born out of the seed of its work.
2.Swayam athma hi bhagawan, Jnana roopo Maheswara ,
Namo Brahman jagath sruth thadhubhava namosthuthe.
The god is himself the soul and he is the greatest god with the form of wisdom,
Salutations to Brahman and to the one from whom Brahma who created was born.
3.SArvajitha , jagath jetha, jeeva jeeva manohara ,
Rathibheeja, rathiswamin , rathipriya namosthuthe.
Salutations to him who has won everybody , who has won the universe,
Who is the pretty soul of all beings , who is the root of pleasure ,
Who is the god of pleasure* and one who likes pleasure.
*It could be also “RathI”, the wife of Manmatha,
4.Saswad yoshidhanushtana, yoshid pranathika Priya,
Yoshi vahanam, yoshasthra yosha dwandwo namosthuthe.
I salute the two goddesses and one who is permanently with them,
And Who is dearer than soul to them , as well as ,
The vehicle of those goddesses and the weapons of those Goddesses.
5.Pathi sadhya kara sesha roopadhara , gunasraya,
Sugandhi vatha sachiva , Madhu mithra namosthuthe.
Salutations to the one who is considered fit for his riding .
To the one who assumed the form of Adhisesha,
Who depends on good qualities, who carries the perfumed air ,
And who is the friend of the sweet one.
6.SAswad yoni kruthadhara , sthree sandarshana vardhana,
Vidagdhaanaam virahinaam prananthaka namosthuthe.
Salutations to him who is the basis of the creation done, again and again,
Who increases the chance of meeting ladies and ,
Who is the killer of undigested food and pangs from separation.
7.Akrupa yeshu thenartha , theshaam jnanam vinasanam,
Anooha roopa bhaktheshu krupa sindho namosthuthe.
If your grace is not there , it would mean destruction of his wisdom,
So salutations to the ocean of mercy from this careless devotee.
8.Thapasvinam cha thapasaam Vighna, bheejaaya leelaya,
Mana sakaamam mukthaanam karthu shaktham namosthuthe.
I salute him who is capable of removing passion from the mind,
And also problems for penance to the sages as a matter of play.
9.Thapa saadhya sthadha aaradhya sadaivam Pancha bhouthika,
Panchendra krutha adhara Pancha bana namosthuthe.
I salute the God with five arrows , who helps in penance and worship,
Of all the Gods as well as the five elements and who is the basic of action of the five sense organs.
10.Mohinithyeva mukthaathu manasa saa vidhe pura,
Vira rama namra vakthra bhaboova dhyana thathparaa.
In the places of stay , Those who followed Mohini were liberated,
When they prayed with bent heads and were interested in meditation
11.uktham madhyamdhino kanthe stotramethath manoharam,
Puraa durvaasasa datham mohinyai Gandha madhane.
Repeat during rnoon , oh dear , this stotra
which was given by Sage Durvasa to Mohini ,
at the Gandha madhana mountain.
12.Stotra methath maha punyam kaami bhakthya yadhaa pateth,
Abheeshtam labhathe noonam , nishkalanko bhavathe dhruvam.
If this very holy stotra which if read with devotion by the passionate one ,
Without doubt his wish would be fulfilled ,
And he will definitely would become stainless.
13.Cheshtaam na kuruthe kama kadhachith api tham priyam,
Bhavedh arogi sri yuktha , kama deva sama prabha.
Vanitham labhathe sadhvim pathim trilokya mohinim.
Without taking any action , sometimes the loved one would become his own,
And he would be blessed with health and wealth and shine like the God of love,
And also he would get the pious lady who is the mind stealer in the three worlds as his wife.
Ithi Sri Mohini krutham Krishna stotram samaptham
Thus ends the prayer to Lord Krishna composed by Mohini.
Translation by P.R.Ramcchander.