It's kinda hard to find bro-mon

Bro-Mon Bro-Mon Chatter
1

can bro-mon spawn like every 15-30 minutes and the longer it takes the rarity goes higher (unless you lose a battle)

2

Hey,
In the upcoming update we will increase the spawn rate of bro-mons. So you can meet them more often.

3

when

4

soon, today or tomorrow