Who is the strongest Pokemon trainer ever and where can you meet them?

Her name is Logan and Her partner is Jay. Logan's team is palkia dialga giritina mew arceus jirachi and her starters are the awesome pair of Riolu and Eevee. Jay has alakazam machamp floatzal noctowl torterra and rapidash. They sometimes are at the conover wal-mart in north carolina. They are powerful and never have been beat.