I jailbroke my n3ds and managed to fit DQ 1-9 on there.
I beat DQ 1,4,5,6,7,8,9,11 and DQ Builders 1/2
Dragon Quest 9 was a really fun experince due to the less party memebers you have, the more experince you'd get and because of that I got greedy and did a solo party member run.
It was basically 64 hours of grinding and me maxxing various weapons and classes so I can combine them all to become a one woman party and curbstomp the rest of the game without help. I beat the game as a gladiator.
I really couldn't beat the final boss without miracle slash, high def and a bit of luck due to him inflicting status effects and magic always hitting like a truck unless I used magic mirror or some shit to repel it, but then they'd use disrupitve wave and sometimes get a second turn in a row where I can't do shit about it.
It was a pain in the ass but a fun pain in the ass.
I followed a youtube videos instructions.
I made it to level 70's then got most of my party to level 99.
I still couldn't max out all of their skill hexagons surprisingly.
Good fucking luck anon.
If you get lost don't feel bad to look up guides online.
DQ games can be a pain in the ass like that sometimes.