I´d ask for a kingdra,
I love the sea so much i wish i could breathe underwater and if i could teach dive to him i WOULD be ale to do so, and go deeper than any other man ever did
And i´d like to travel by surf ( LoL )
Or i´d ask for a celebi, that way i´d be able to travel in time, correct my mistakes, learn with them and live happily knowing that i ACTUALLY did my BEST.