Giant monsters like Bjorn are a neat addition to Dragon Quest Monsters: Joker 2. What inspired you to add these to the game?
We decided that giant monsters would definitely be more impressive, so the first thing we decided on was to include giant monsters. We knew we had something right then and there.

Player vs. player online battles are new for Dragon Quest Monsters: Joker 2. Why did you want to add this feature and how difficult was it to create?
We decided to add player vs. player online battles because of the strong demand for them from DQMJ1 players and because adding them would enable players to enjoy the game longer. The thing that made adding this feature difficult was the amount of time we had to spend checking it during development. Checking communication features during development is rough.

Source: Siliconera