Two groups of Trainers can be battled on one day by saving inside the Battleground the day before. Then, the player battles the Trainers, walks out, walks back in, and the Trainers have changed.
If some of the Trainers have not changed, those Trainers will not be able to be rebattled.
During the time Gym Leaders appear here, they can still be found in their respective Gyms and possibly also the Villa. This is probably due to the Battleground not being part of the main storyline; the game randomly determines which four characters can be challenged on any particular day.
All of the Trainers in the Battleground have Pokémon between levels 61 and 65, except for Maylene, whose Pokémon are between levels 62 and 66.
Maylene is also the only Trainer in the Battleground whose party does not consist of two level 61 Pokémon, one level 62 Pokémon, one level 63 Pokémon, and one level 65 Pokémon, instead consisting of two level 62 Pokémon, one level 63 Pokémon, one level 64 Pokémon, and one level 66 Pokémon.
Maylene is the only Trainer without any Pokémon holding an item.
Maylene also offers more prize money than any other Trainer in the Battleground. When the player defeats the other Trainers, he/she receives 7,800, however beating Maylene earns the player 7,920.
When both Roark and Byron appear at the same time, their after-battle dialog changes from what it normally would be; Roark tells the player that when he became a Gym Leader, he realized how great a Trainer his dad is, but that he would never admit it in front of his father. Byron talks to himself about how Roark thinks he can "show up his old man", and that he, Byron, will need to get better to prevent that from happening.
A small graphical glitch occurs with the counter and TV on the right side of the room. When the player (or even an NPC) is next to either object, it can cause the colors to "jump" out of line.