I've played over the past 2-3 months Dragon Quest Monsters 3DS games. They are imports and I don't know Japanese but I have got sufficiently far in all three. Here are my opinions so far:
Monsters 1 Remake: Underwhelming, random map generation is more stale, the atmosphere and imagination of the GBC versions aren't there. More monsters, but a lot are blocked off by very RNG reliant egg system actually letting you get them. Top monster in the game is also very underwhelming. Lastly most skillsets were nerfed and have crippling maluses on them which make them not worth using.
Monsters 2 Remake: Spectacular, key system is eh but the content is massive and not as punishing or RNG reliant as TW with Eggs. Going online just a bit every day should be enough to eventually net you the strongest monster in the game, who is as wicked gameplay-wise as he looks. More memorable postgame too. There is a smartphone version you can get which adds 100 more monsters and is basically the definitive Dragon Quest Monsters Experience. Combine 2 3DS coming out when one of the weakest Pokemon Games (XY, though I have to admit I quite love XY I can't ignore all of its problems) installments releasing, and it just looks even better.
Joker 3 (Professional): Many changes to breeding, monster appearances, and mechanics. A lot of quality of life things are done like removing gender (Which felt vestigial by the point of M2 3D), automatic phoenix staff option, and super synthesis being very cool (You can customize the traits of a monster) but the plot is kind of a mess, graphics are a downgrade, breeding trees are nonsensical and convoluted. Overall mixed. I went as far as I could on M1 and M2 but I am finding more fun playing Pokemon Emerald and losing attention to J3P if that is a sign.