he's in mineral town. you need to get the gameboy version and connect it.

You have to plug in a GBA cartridge and play DS Cute while the GBA is plugged in. You'll
get the Mineral Town characters then. Trent will appear on Wednesdays, seeing as it's his
and Elli's day off. He spends a lot of time with Hardy during the day, later going to the
Harvest Sprite tree area. He still likes milk, too.

But i'm playing in my computer D: and i dont know how get the bachelors of mineral town x3
may someone help me please?

If u`re playing on ur com simply click the toolbar on ur emulation. u`ll see a gba slot .
u have to download the friends of mineral town in order to get the doctor.i suggest you
download from www.coolrom.com