I have talked with the original account owner of Yashvanth and he said that he only gave his account because yashvanth said he would give good pokemon for his account
The original owner got only some of his pokemon back and has put them in a another account
These are his other pokemon that yashvanth is not willing to give the original owner :
1. Shiny Hoopa (Unbound) is nicknamed GOLDENGIANT
2. Metallic Greninja (Ash)
The original account owner now has a account named pk1234 and pk1234 has begged yashvanth to give his pokemon and his account back and yashvanth has completely ignored him
Yashvanth's alt account is yash567